Here's whatsnew:

Greatly improved invalid DMA transfer behavior, should be nearly perfect now
Major code cleanup -- most importantly, almost all PPU timing-related settings moved back to PPU, from CPU
Added option to auto-detect file type by inspecting file headers rather than file extensions
Rewrote video filter system to move it out of the emulation core -- HQ2x and Scale2x will work even in hires and interlace modes now, 50% scanline filter added
Re-added bsnes window icon
Added new controller graphic when assigning joypad keys [FitzRoy]
Redundant "Advanced" panel settings which can be configured via the GUI are no longer displayed
Improved speed regulation settings
XP and Vista themes will now apply to bsnes controls
Added "Path Settings" window to allow easy selection of default file directories
Tab key now mostly works throughout most of the GUI (needs improvement)
Main window will no longer disappear when setting a video multipler which results in a window size larger than the current desktop resolution
Added two new advanced options: one to control GUI window opacity, and one to adjust the statusbar text

Get it here:
http://byuu.cinnamonpirate.com/bsnes/

-Trebor