Basically, the version column expands to fit the fattest version in the list. So, installing repositories with long version numbers, or red-pill mode (which shows a lot more packages, including many with long versions), gives you this problem. Unfortunately, there's nothing to do at the moment except:

• Don't take the red-pill.
• Disable any repos with troublesome packages (except to install something from them).
• Go full-screen (every pixel helps).

From Bugzilla, word is that it's fixed in Diablo.
https://bugs.maemo.org/show_bug.cgi?id=2959