diff --git a/Utilities/Thread.cpp b/Utilities/Thread.cpp
index aac60cad67..61619466a3 100644
--- a/Utilities/Thread.cpp
+++ b/Utilities/Thread.cpp
@@ -22,8 +22,7 @@
 static void report_fatal_error(const std::string& msg)
 {
 #ifdef _WIN32
-	const auto& text = msg + "\n\nPlease report this error to the developers. Press (Ctrl+C) to copy this message.";
-	MessageBoxA(0, text.c_str(), "Fatal error", MB_ICONERROR); // TODO: unicode message
+	MessageBoxA(0, msg.c_str(), "Fatal error", MB_ICONERROR); // TODO: unicode message
 #else
 	std::printf("Fatal error: %s\nPlease report this error to the developers.\n", msg.c_str());
 #endif
@@ -1195,6 +1194,23 @@ static LONG exception_filter(PEXCEPTION_POINTERS pExp)
 
 	// TODO: print registers and the callstack
 
+	// Exception specific messages
+	if (pExp->ExceptionRecord->ExceptionCode == EXCEPTION_ACCESS_VIOLATION)
+	{
+		msg += "\n\nAn internal access violation has occured."
+		       "\nPlease only report this error to the developers, if you're an advanced user and have obtained a stack trace.";
+	}
+	else if (pExp->ExceptionRecord->ExceptionCode == EXCEPTION_ILLEGAL_INSTRUCTION)
+	{
+		msg += "\n\nAn internal illegal instruction exception has occured."
+		       "\nRPCS3 requires a modern x86-64 CPU that supports SSSE3 (and SSE4.1 for PPU LLVM recompiler)."
+		       "\nPlease make sure that your CPU supports these extensions.";
+	}
+	else
+	{
+		msg += "\n\nAn unknown internal exception has occured. Please report this to the developers.\nYou can press (Ctrl+C) to copy this message.";
+	}
+
 	// Report fatal error
 	report_fatal_error(msg);
 	return EXCEPTION_CONTINUE_SEARCH;
@@ -1232,6 +1248,8 @@ static void signal_handler(int sig, siginfo_t* info, void* uct)
 	const u64 addr64 = (u64)info->si_addr - (u64)vm::base(0);
 	const auto cause = is_writing ? "writing" : "reading";
 
+	// TODO: Exception specific informative messages
+
 	if (addr64 < 0x100000000ull && thread_ctrl::get_current())
 	{
 		// Try to process access violation
@@ -1358,7 +1376,7 @@ void named_thread_t::start()
 		}
 		catch (const std::exception& e)
 		{
-			LOG_FATAL(GENERAL, "Exception: %s\nPlease report this to the developers.", e.what());
+			LOG_FATAL(GENERAL, "Exception: %s", e.what());
 			Emu.Pause();
 		}
 		catch (EmulationStopped)
diff --git a/rpcs3/Emu/SysCalls/Modules/cellL10n.cpp b/rpcs3/Emu/SysCalls/Modules/cellL10n.cpp
index 21be193baa..f10a030ac2 100644
--- a/rpcs3/Emu/SysCalls/Modules/cellL10n.cpp
+++ b/rpcs3/Emu/SysCalls/Modules/cellL10n.cpp
@@ -1146,9 +1146,10 @@ s32 SJIStoEUCJP()
 	throw EXCEPTION("");
 }
 
-s32 UTF8stoUTF16s()
+s32 UTF8stoUTF16s(vm::cptr<void> src, vm::cptr<s32> src_len, vm::ptr<void> dst, vm::ptr<s32> dst_len)
 {
-	throw EXCEPTION("");
+	cellL10n.warning("UTF8stoUTF16s(src=*0x%x, src_len=*0x%x, dst=*0x%x, dst_len=*0x%x)", src, src_len, dst, dst_len);
+	return _L10nConvertStr(L10N_UTF8, src, src_len, L10N_UTF16, dst, dst_len);
 }
 
 s32 SJISstoUCS2s(vm::cptr<void> src, vm::cptr<s32> src_len, vm::ptr<void> dst, vm::ptr<s32> dst_len)
diff --git a/rpcs3/Emu/SysCalls/Modules/cellPngDec.cpp b/rpcs3/Emu/SysCalls/Modules/cellPngDec.cpp
index 4b26ca25c4..fb98adc097 100644
--- a/rpcs3/Emu/SysCalls/Modules/cellPngDec.cpp
+++ b/rpcs3/Emu/SysCalls/Modules/cellPngDec.cpp
@@ -591,10 +591,11 @@ s32 pngDecodeData(PPUThread& ppu, PHandle handle, PStream stream, vm::ptr<u8> da
 	// Check if the outputWidthByte is smaller than the intended output length of a line. For example an image might be in RGB, but we need to output 4 components, so we need to perform alpha padding.
 	else if (stream->out_param.outputWidthByte < (stream->out_param.outputWidth * stream->out_param.outputComponents))
 	{
-		// Not sure what to do, when a fixed alpha value isn't specified.
+		// Not sure what to do, when a fixed alpha value isn't specified, but specifying full opaque seems to cause no issues currently. Logging this just in case.
 		if (!stream->fixed_alpha)
 		{
-			throw EXCEPTION("Fixed alpha not specified for padding.");
+			cellPngDec.error("Fixed alpha not specified for padding. Please notify a developer of this.");
+			stream->fixed_alpha_colour = 255;
 		}
 
 		// We need to fill alpha (before or after, depending on the output colour format) using the fixed alpha value passed by the game.
@@ -646,12 +647,6 @@ s32 pngDecodeData(PPUThread& ppu, PHandle handle, PStream stream, vm::ptr<u8> da
 		// Check if we need to flip the image or leave empty space at the end of a line
 		if ((bytes_per_line > stream->out_param.outputWidthByte) || flip)
 		{
-			// Flipping is untested
-			if (flip)
-			{
-				throw EXCEPTION("Flipping is not yet supported.");
-			}
-
 			// Get how many bytes per line we need to output - bytesPerLine is total amount of bytes per line, rest is unused and the game can do as it pleases.
 			const u32 line_size = std::min(bytes_per_line, stream->out_param.outputWidth * 4);
 
diff --git a/rpcs3/Emu/SysCalls/Modules/sys_libc.cpp b/rpcs3/Emu/SysCalls/Modules/sys_libc.cpp
index a7ec31eb24..0045cdf423 100644
--- a/rpcs3/Emu/SysCalls/Modules/sys_libc.cpp
+++ b/rpcs3/Emu/SysCalls/Modules/sys_libc.cpp
@@ -191,9 +191,13 @@ s32 _sys_memchr()
 	throw EXCEPTION("");
 }
 
-s32 _sys_memmove()
+vm::ptr<void> _sys_memmove(vm::ptr<void> dst, vm::cptr<void> src, u32 size)
 {
-	throw EXCEPTION("");
+	sysPrxForUser.trace("_sys_memmove(dst=*0x%x, src=*0x%x, size=%d)", dst, src, size);
+
+	memmove(dst.get_ptr(), src.get_ptr(), size);
+
+	return dst;
 }
 
 s64 _sys_strlen(vm::cptr<char> str)