Some issues here too. Can't temporarily show address bar and I need it to access lastpass, there is weird horizontal line near the top etc.

How did you revert back? Is there some interface option or I have to dig out old download?

Pentadactyl is unfortunately messing with userChrome itself (shrinking size of tab bar), which the devs really should not do across the board (it breaks a lot of unrelated addons).

Which I hate to say as a diehard Pentadactyl user.

Have you tried the Nightly builds of pentadactyl? Those usually work upto and including Fx30, and usually are updated to work with whatever is on Aurora.

I haven't had problems yet - what were your issues?