I have Splash Lite installed on 32 bit Windows Seven - no issues I'm aware of.
But on Vista Home Premium SP1 64 bit, as soon as I select Options whether from the toolbar or via the context menu, instant crash. I can open Options and choose settings on Windows Seven 32 bit with no problem.
The Vista64 machine is HP Pavilion m9515y with Phenom X4 9850 and Nvidia GeForce 9600 GS. MKV and MP4 files play fine. But if I select Options, I get the Vista "the application has stopped working" dialog instantly. If I'm lucky maybe this bug is already fixed in the version due out soon. I like the player.