Massive problems with SR1

I installed the new service back a few hours ago and was quite excited to try out the new features.

However, the new service pack has slowed down the translation process to the point where it is almost unbearable. For some reason, Trados now keeps copying the text form the source to the active translation segment, even though I have this option turned off. I tried deactivating the "LookAhead" feature, but that doesn't help either. I also have problems copying and pasting text between segments (ctrl+c and ctrl+v doesn't seem to work (nor cmd+c or cmd+v which we would normally use on a mac)).

Also, if I do a "search and replace" to change words in already confirmed segments, the sentences I replace words in revert to the source language (!), and then Trados freezes up.

Is it possible to roll back to the previous version?

Johanna