1) Maybe try to uninstall and reinstall TI backup. Worse comes to worse you may just have to salvage what you can and redo the SD card and reinstall the missing apps. If u can wait, see if others have any other ideas but if not, start clean.
2) If you have rom manager, try to fix permissions as well.
3) try clearing the cache and dalvik cache as well...
4) If u end up doing a clean install and stuff, backup your sd card as best you can first. The boot into recovery (use AmonRa 2.3 - best one in my opinion for stuff like this)and format the card and give more room for ext2 (if u stick with gingerbread you can upgrade to ext4 (2 to 3 to 4 and again run the fix option). Next copy the rom, kernel, radio etc to your SD card.
5) Now just wipe everything, cache, data, etc. And install your rom. Then boot it up. SETUP your wifi first.
6)Once you set that up, install your gaaps and reboot. Run through the setup. If you have tons of apps. It will take a while BUT it will download much faster on wifi. Trust me on this one as I do it enough to know lol.
7)Reboot into recovery then install your kernel and reboot.
IF TI backup worked, copy it back over to you SD card, reinstall TI and restore.