Are people still getting main script exectution errors from any of these?

I'm to scared to run any more then the ones I already have and trust. I'd love to add shai's source and add all sources and enjoy the added stuff but I've had too many bad experiences.

I've done a dozen or so restores and now that I'm running vista 64 sync'ing and restoring is a lot more difficult.

To solve the problem of sync'ing I installed VMware and have a virtual machine running XP for the sole purpose of running itunes.

If anyone is still getting main script execution errors which sources have you found to be safe and trustworthy?