Last week I installed the new version of Movable Type, version 4. Six Apart have made much fanfare, understandably because it's quite an overhaul of the software, and the look and feel of the administration system has changed an awful lot. They actually seem to have taken more than a few leaves out of Wordpress's book: the login screen, for one thing; the dashboard (although it's not really like Wordpress, on which the Dashboard is dominated by material sourced from two Wordpress-related blogs); the menus along the top of the screen rather than the side.
There are, however, a number of annoying features in the new MT. The first is that the admin screens always open to one particular blog, not to the System Overview as before, which means you have to take two steps to do what I always do on logging in to MT: check my comments and trackbacks, across the board, for spam. There does not seem to be an option to set how the admin interface opens. While I'm sure many MT installations are multi-user and many users only have posting rights for one blog, that's not the case for the personal bloggers which still remain from "the old days".
Second, the drop-down menus are actually a nuisance. They can be slow to appear (perhaps the Six Apart developers have access to fast new machines, but not all of us do) and when menus overlap with other features on the screen, they often get cut off (the "Manage" menu is particularly prone to this). It seems to mostly affect Firefox, particularly on Linux.
Third, the template editor is actually incompatible with some browsers, particularly Konqueror. The code appears briefly, then disappears, leaving the editor window blank. If they cannot fix this problem, they should at least give us the ability to turn the new editor off and use the old one. Of course, some might say that I should just use another browser, but Konqueror has features that Firefox - its only real competitor on Linux - doesn't, like the ability to store Yahoo and Hotmail IDs and passwords. (Thankfully, the entry editor is not affected by this problem.)