Thanks for responding. I meant that when I would previously empty the trash on Thunderbird it would pop up an "are your sure, files will be totally irretrievable" type of message (or something similar, can't remember) and you'd have to hit continue to get it to delete the files in the trash. Now when I hit delete trash, it just does it. I liked the warning so I could double check for something I might not want to delete.
I couldn't find it in the tools/options?!?!??