Well, I just noticed that .8 was just released and added a Global Inbox.
"POP3 users can now combine all of their POP3 accounts into a single global inbox under local folders."

Something you might want to do is reset the junkmail training data on the "Adaptive Filter" tab. Then go into your junk mail folder and mark it all as junk again. I know one of the version upgrades the release notes said to do this since the filters had changed. So now I keep my junkmail so when they require this again I will have some junk mail to train the filters.