IIRC Trash used to display the total number of messages in it (in the left
frame that is). Now, I noticed it displays the total number of unread
messages (simiarily to other folders, when that option is selected under
Options > Folders). Should't the number be of the _total_ number of
messages? Most messages under trash are messages that have already
been read and afterwards deleted.
This is not a bug, per say, but more of a suggestion. I used to Purge the
Trash folder when it reached a certain number of messages, now it's more
complicated to notice that number.