Most of you are talking way beyond my capabilities here!
I accepted the update and the only things I've noticed so far are a slightly different locked screen, a load of junk bookmarks added to my internet list and mail not working properly.
I can download emails onto the handset, but when I try to open them, an error message flickers up, disappears, and then it returns to the inbox. Not terribly helpful.
Any suggestions anyone? If it's possible, I'd be happy to uninstall the update - the new-look locked screen wouldn't be a deal breaker!