The (hopefully) last fix for this release corrects the issue reported by creaothceann and a few issues I´ve encountered myself:
http://download.sessionclan.de/overfiend/snes9x/snes9x-1.52-win32.fix4.zip

I´ve also made a special win9x build for sjyune:
http://download.sessionclan.de/overfiend/snes9x/win9x/snes9x-1.52-win32.w9x.zip

And here is a list of the fixes:
Code:

fix4:
-selecting "display messages before applying filters" prior to loading any rom could cause a crash
-hq4x and simple4x did not work correctly in DirectDraw and 32bit modes
-selecting filters with different scales for normal/hi-res modes caused incorrect message scaling
-the rom information window was always disabled

fix3:
-avi recording crashed on < vista
-delete key mapping did not work after emulator restart

fix2:
-parts of the window stopped updating when previously covered by other windows (only in d3d mode)

fix1:
-display corruption in Super Metroid/Donkey Kong Country/... due to compiler optimization


Sorry about all the small bugs - it seems I focused too much on the sound changes and thus missed the rest...