Some news straight taken from the imbNES homepage:

imbNES has been updated slightly to version 1.3.2 to address some annoying bugs in the 1.3 release. Here’s what’s new:- fixed a bug that was causing the majority of the games on a CD to be unplayable if certain ROMs were included on the disc.- fixed a major problem with the save to memory card function that was preventing most 3rd party cards from working properly.- turbo toggle buttons are now unmapped by default because so many people were turning on turbos without realizing it and thinking it was a bug in the game.The Help page has also been updated with more explicit instructions and additional help for people who want to use Nero to burn their CD.