Jailbroke, iphone 4, 4.1 fw. JB w/ greenpoison.

Installed "yourtube" or "xytube" (not sure which) from a repo in cydia, now my multi-task bar is gone, it's disappeared, just blank. I uninstalled whatever youtube app it was, resprung, etc. Still no multi-taskbar. Any solution to fix? Don't really want to restore and jb again.