webman runs w/o cobra? I know about the auto mamba loader, but mamba = cobra lite. There are very minimal differences now between the two.Are you using the cobra version of overflow?
My advice is go back to rebug, or use ferrox. most people have no issues with one of those two. If you choose to use another firmware, i'd probably ask where the release was found, to get better answers. HERE, 99% of your base is on rebug or ferrox.