When I use tabs in vim, I use the shortcut ctrl+pgup and ctrl+pgdn for navigating between tabs. I realize I can do :tabnext and :tabprev, but that is certainly more keystrokes.
Everything works fine until I'm running vim in a screen session. To reproduce:
touch .screenrc.tmp && screen -c .screenrc.tmp
(launch screen with an empty screenrc)
vim -p file1 file2
and attempt to navigate between tabs via ctrl+pgup and ctrl+pgdn. Some strange capitalization changes will happen too, if you have some text in either file.
screen version is 4.00.03jw4
vim version is 7.3.429