Here's whatsnew:

SPC7110 decompression code updated to latest version by neviksti and converted to a state machine; SPC7110 overhead is now identical to S-DD1 overhead (eg ~5% speed hit over standard games)
Fixed a major bug in SPC7110 data port emulation that was crashing Super Power League 4 [Jonas Quinn]
HDMA trigger point corrected to H=1104, bus sync timing corrected
All illegal DMA A-bus accesses should now be properly blocked
DMA state machine rewritten, greatly simplified
Major corrections to HDMA run timing; fixes flickering bugs in Mecarobot Golf and Super Mario Kart
Emulator now defaults to 2/1/3 SNES (CPU/PPU1/PPU2 revision numbers)
Multitap emulation added, can be attached to either or both controller ports; user interface updated to reflect this
Status messages (cartridge loaded / unloaded, UPS patch applied, etc) now appear in status bar
Added advanced configuration option, "input.analog_axis_resistance", to control gamepad analog stick sensitivity

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

-Trebor