>Hi Nick,
>>>
>>>I used UT today at work and all was fine. But now at home it opens each message in another window, which is very inconvenient for me and very annoying! How can I get the previous 'normal' behavior?
>>>
>>>TIA
>>
>>Reboot?
>
>:) You're too strong :) I just livea and returned, and it works. But now my husband came from work, so I have to do my home's duty (supper, etc.) :)

OK, so the SHIFT key (for upper-case letters) was stuck, giving you SHIFT-CLICK and messages in new windows. Then you replied to a message, which un-stuck your SHIFT key, and now everything is wonderful.

Mystery solved.