I haven’t been able to get MT to work since I left it for WordPress 2 years ago. I’ve been continuing to upgrade and try the installs with all my old posts that I had when I left it. MT 4.1 started working for a few days, but now all of a sudden when I try to publish anything…posts, templates, anything,. I get an error box that says “An error occurred, with a red exclamation point, but no description of the error. The area next to the red exclamation point is blank. What the heck? This is horrible. I was trying a solution for remapping the post URLs from my old archives/00001.html to the new archives/post-title-like-this.html. But when I tried uploading the template, I got the dumb useless error.
The logs don’t tell me what the error was either.
Unfortunately Movable Type’s logging is rather terse by default. But did you try enabling debugging? Add the line:
mt/mt-config.cgifile, then try to reproduce the problem; if it happens again, you should get something at least marginally informative in your server’s error log.
(More information about Movable Type’s debugging options is available here.)