diff --git a/Source/Core/Common/FileSearch.cpp b/Source/Core/Common/FileSearch.cpp
index 4b3b0820d2..cca5c095f7 100644
--- a/Source/Core/Common/FileSearch.cpp
+++ b/Source/Core/Common/FileSearch.cpp
@@ -14,6 +14,8 @@
 namespace fs = std::experimental::filesystem;
 #define HAS_STD_FILESYSTEM
 #else
+#include <cstring>
+#include "Common/CommonFuncs.h"
 #include "Common/FileUtil.h"
 #endif
 
@@ -55,11 +57,10 @@ std::vector<std::string> DoFileSearch(const std::vector<std::string>& directorie
       return true;
     if (entry.isDirectory)
       return false;
-    std::string name = entry.virtualName;
-    std::transform(name.begin(), name.end(), name.begin(), ::tolower);
     return std::any_of(exts.begin(), exts.end(), [&](const std::string& ext) {
+      const std::string& name = entry.virtualName;
       return name.length() >= ext.length() &&
-             name.compare(name.length() - ext.length(), ext.length(), ext) == 0;
+             strcasecmp(name.c_str() + name.length() - ext.length(), ext.c_str()) == 0;
     });
   });
 }
diff --git a/Source/Core/DiscIO/Blob.h b/Source/Core/DiscIO/Blob.h
index 9e92b08ae4..686605ed80 100644
--- a/Source/Core/DiscIO/Blob.h
+++ b/Source/Core/DiscIO/Blob.h
@@ -25,7 +25,7 @@
 
 namespace DiscIO
 {
-// Increment CACHE_REVISION (ISOFile.cpp & GameFile.cpp) if the enum below is modified
+// Increment CACHE_REVISION (GameListCtrl.cpp) if the enum below is modified
 enum class BlobType
 {
   PLAIN,
diff --git a/Source/Core/DiscIO/Enums.cpp b/Source/Core/DiscIO/Enums.cpp
index bfd9da0254..eae90b34ab 100644
--- a/Source/Core/DiscIO/Enums.cpp
+++ b/Source/Core/DiscIO/Enums.cpp
@@ -16,7 +16,7 @@ bool IsNTSC(Region region)
   return region == Region::NTSC_J || region == Region::NTSC_U || region == Region::NTSC_K;
 }
 
-// Increment CACHE_REVISION (ISOFile.cpp & GameFile.cpp) if the code below is modified
+// Increment CACHE_REVISION (GameListCtrl.cpp) if the code below is modified
 
 Country TypicalCountryForRegion(Region region)
 {
diff --git a/Source/Core/DiscIO/Enums.h b/Source/Core/DiscIO/Enums.h
index b06576c685..fb604fd3be 100644
--- a/Source/Core/DiscIO/Enums.h
+++ b/Source/Core/DiscIO/Enums.h
@@ -10,7 +10,7 @@
 
 namespace DiscIO
 {
-// Increment CACHE_REVISION (ISOFile.cpp & GameFile.cpp) if these enums are modified
+// Increment CACHE_REVISION (GameListCtrl.cpp) if these enums are modified
 
 enum class Platform
 {
diff --git a/Source/Core/DolphinWX/GameListCtrl.cpp b/Source/Core/DolphinWX/GameListCtrl.cpp
index 83fd250d62..be80107790 100644
--- a/Source/Core/DolphinWX/GameListCtrl.cpp
+++ b/Source/Core/DolphinWX/GameListCtrl.cpp
@@ -80,6 +80,8 @@ public:
   wxProgressDialog* dialog;
 };
 
+static constexpr u32 CACHE_REVISION = 2;  // Last changed in PR 5687
+
 static bool sorted = false;
 
 static int CompareGameListItems(const GameListItem* iso1, const GameListItem* iso2,
diff --git a/Source/Core/DolphinWX/GameListCtrl.h b/Source/Core/DolphinWX/GameListCtrl.h
index 6dbcf8aa3e..3004ce2e8a 100644
--- a/Source/Core/DolphinWX/GameListCtrl.h
+++ b/Source/Core/DolphinWX/GameListCtrl.h
@@ -125,7 +125,6 @@ private:
   } m_image_indexes;
 
   // Actual backing GameListItems are maintained in a background thread and cached to file
-  static constexpr u32 CACHE_REVISION = 2;  // Last changed in PR 5687
   std::list<std::shared_ptr<GameListItem>> m_cached_files;
   // Locks the list, not the contents
   std::mutex m_cache_mutex;
diff --git a/Source/Core/DolphinWX/ISOFile.cpp b/Source/Core/DolphinWX/ISOFile.cpp
index 3b607e8cf2..7a35cdb10a 100644
--- a/Source/Core/DolphinWX/ISOFile.cpp
+++ b/Source/Core/DolphinWX/ISOFile.cpp
@@ -90,8 +90,9 @@ GameListItem::GameListItem(const std::string& filename)
       m_disc_number = volume->GetDiscNumber().value_or(0);
       m_revision = volume->GetRevision().value_or(0);
 
-      std::vector<u32> buffer = volume->GetBanner(&m_banner.width, &m_banner.height);
-      ReadVolumeBanner(&m_banner.buffer, buffer, m_banner.width, m_banner.height);
+      auto& banner = m_volume_banner;
+      std::vector<u32> buffer = volume->GetBanner(&banner.width, &banner.height);
+      ReadVolumeBanner(&banner.buffer, buffer, banner.width, banner.height);
 
       m_valid = true;
     }
@@ -113,18 +114,17 @@ GameListItem::GameListItem(const std::string& filename)
     // A bit like the Homebrew Channel icon, except there can be multiple files
     // in a folder with their own icons. Useful for those who don't want to have
     // a Homebrew Channel-style folder structure.
-    if (SetWxBannerFromPngFile(path + name + ".png"))
+    if (SetWxBannerFromPNGFile(path + name + ".png"))
       return;
 
-    // Homebrew Channel icon. Typical for DOLs and ELFs,
-    // but can be also used with volumes.
-    if (SetWxBannerFromPngFile(path + "icon.png"))
+    // Homebrew Channel icon. The most typical icon format for DOLs and ELFs.
+    if (SetWxBannerFromPNGFile(path + "icon.png"))
       return;
   }
   else
   {
     // Volume banner. Typical for everything that isn't a DOL or ELF.
-    SetWxBannerFromRaw(m_banner);
+    SetWxBannerFromRaw(m_volume_banner);
   }
 }
 
@@ -196,12 +196,12 @@ void GameListItem::DoState(PointerWrap& p)
   p.Do(m_blob_type);
   p.Do(m_revision);
   p.Do(m_disc_number);
-  m_banner.DoState(p);
+  m_volume_banner.DoState(p);
   m_emu_state.DoState(p);
   p.Do(m_custom_name);
   if (p.GetMode() == PointerWrap::MODE_READ)
   {
-    SetWxBannerFromRaw(m_banner);
+    SetWxBannerFromRaw(m_volume_banner);
   }
 }
 
@@ -227,7 +227,7 @@ void GameListItem::ReadVolumeBanner(std::vector<u8>* image, const std::vector<u3
   }
 }
 
-bool GameListItem::SetWxBannerFromPngFile(const std::string& path)
+bool GameListItem::SetWxBannerFromPNGFile(const std::string& path)
 {
   if (!File::Exists(path))
     return false;
@@ -242,13 +242,13 @@ bool GameListItem::SetWxBannerFromPngFile(const std::string& path)
 
 void GameListItem::SetWxBannerFromRaw(const Banner& banner)
 {
+  if (banner.empty())
+    return;
+
   // Need to make explicit copy as wxImage uses reference counting for copies combined with only
   // taking a pointer, not the content, when given a buffer to its constructor.
-  if (!banner.empty())
-  {
-    m_banner_wx.Create(banner.width, banner.height, false);
-    std::memcpy(m_banner_wx.GetData(), banner.buffer.data(), banner.buffer.size());
-  }
+  m_banner_wx.Create(banner.width, banner.height, false);
+  std::memcpy(m_banner_wx.GetData(), banner.buffer.data(), banner.buffer.size());
 }
 
 bool GameListItem::BannerChanged()
@@ -256,27 +256,27 @@ bool GameListItem::BannerChanged()
   // Wii banners can only be read if there is a savefile,
   // so sometimes caches don't contain banners. Let's check
   // if a banner has become available after the cache was made.
-  if ((m_platform == DiscIO::Platform::WII_DISC || m_platform == DiscIO::Platform::WII_WAD) &&
-      m_banner.empty())
-  {
-    auto& banner = m_pending.banner;
-    std::vector<u32> buffer =
-        DiscIO::Volume::GetWiiBanner(&banner.width, &banner.height, m_title_id);
-    if (buffer.size())
-    {
-      ReadVolumeBanner(&banner.buffer, buffer, banner.width, banner.height);
-      // Only reach here if m_banner was empty, so don't need to explicitly compare to see if
-      // different
-      return true;
-    }
-  }
-  return false;
+
+  if (!m_volume_banner.empty())
+    return false;
+  if (m_platform != DiscIO::Platform::WII_DISC && m_platform != DiscIO::Platform::WII_WAD)
+    return false;
+
+  auto& banner = m_pending.volume_banner;
+  std::vector<u32> buffer = DiscIO::Volume::GetWiiBanner(&banner.width, &banner.height, m_title_id);
+  if (!buffer.size())
+    return false;
+
+  ReadVolumeBanner(&banner.buffer, buffer, banner.width, banner.height);
+  // We only reach here if m_volume_banner was empty, so we don't need to explicitly
+  // compare to see if they are different
+  return true;
 }
 
 void GameListItem::BannerCommit()
 {
-  m_banner = std::move(m_pending.banner);
-  SetWxBannerFromRaw(m_banner);
+  m_volume_banner = std::move(m_pending.volume_banner);
+  SetWxBannerFromRaw(m_volume_banner);
 }
 
 std::string GameListItem::GetDescription(DiscIO::Language language) const
diff --git a/Source/Core/DolphinWX/ISOFile.h b/Source/Core/DolphinWX/ISOFile.h
index f3a89562b0..aa9893eaf3 100644
--- a/Source/Core/DolphinWX/ISOFile.h
+++ b/Source/Core/DolphinWX/ISOFile.h
@@ -94,7 +94,8 @@ private:
   void ReadVolumeBanner(std::vector<u8>* image, const std::vector<u32>& buffer, int width,
                         int height);
   // Outputs to m_banner_wx
-  bool SetWxBannerFromPngFile(const std::string& path);
+  bool SetWxBannerFromPNGFile(const std::string& path);
+  // Outputs to m_banner_wx
   void SetWxBannerFromRaw(const Banner& banner);
 
   // IMPORTANT: Nearly all data members must be save/restored in DoState.
@@ -120,7 +121,7 @@ private:
   u16 m_revision{};
   u8 m_disc_number{};
 
-  Banner m_banner{};
+  Banner m_volume_banner{};
   EmuState m_emu_state{};
   // Overridden name from TitleDatabase
   std::string m_custom_name{};
@@ -133,7 +134,7 @@ private:
   struct
   {
     EmuState emu_state;
-    Banner banner;
+    Banner volume_banner;
     std::string custom_name;
   } m_pending{};
 };