Fixs For Xfire And Cant Use Shift

Tanitha: Merged 20+ xfire / shift key threads into this one, and gave it a proper title so people can find it easier.
And pinned it..
A obvious solution is...
Shift key doesn't work? -> disable xfire.
But is there any current fixes to get Xfire to work, while its on? IE without having to switch it off.
Thanks for the feedback.