Thanks to some recent improvements in wxWidgets, we will be able to release just one version of BitWise for Linux that will work on versions of GTK down to 2.0. This will make downloading BitWise for Linux much simpler, since you won't have to choose a download based on your GTK version. The "all-in-one" BitWise will be compiled against GTK 2.6.10, and will be moved to 2.8 in a future release. The upcoming BitWise 1.0.6 Beta 2 will be the first version of BitWise released with just one Linux version.
A special shout out to Mart Raudsepp for his diligent work on GTK version compatibility in wxWidgets!