I don't think I experienced that, but I almost exclusively use ctrl+tab to switch files. So if that's the case it's a bug and should be fixed.
Hmmm, seems ok in SVN Geany. Maybe the problem is just in 0.20, or maybe I got confused what the order was.
FWIW, it appears this is a rather unknown feature, even though it's really awesome. Can discoverability of such features possibly be improved?
What you want people to RTFM? :)
Although it is linked from the text the details are hidden away in a table.
As for making keybindings discoverable, I thought there was a way of getting a read-only copy of the keybindings in another window, but I can't find it just now.
Cheers Lex