Dear lazyweb,
I am unable to select a userpic for my profile on my blog. When I click on the link I get a list of existing assets and the option to upload new ones. The files upload fine and can be viewed in full at their respective url (ex: http://www.justanotherhacker.com/mt-static/support/uploads/tribalskull.jpg ), but does not have a preview available. Selecting the image I want and clicking save does not appear to change my userpic. I do not get it displayed in the user edit page, the blog "home" page summary, nor when making a comment.
Any suggestions? My initial suspicion falls on the GD libraries or something similar, with a supressed error or silent die, but I haven't dug into the codebase to confirm.
Reported on Movable Type 4.2

Since you mention GD, does that mean that's the graphics library you're using? Do thumbnails get created when you insert a thumb into an entry or similar?
It should be whatever the default is. I haven't set any value for it, but have Imge::Size, GD and Image::Magick installed ( http://www.justanotherhacker.com/mt-check.cgi ).
It does work for a regular entry, but does not work for userpics. The entry and userpic assets are considered separate for MT.
If you haven't set the ImageDriver config directive specifically, then you're using ImageMagick.
Yes, regular assets for entries and userpics are separate, but the question this answers is whether thumbnails are being generated properly or not. Could it be the file type--did you try tribalskull.jpg with the entry, or something else, like a .png or .gif?
Yes, it creates thumbnails for regular entries. Uploading a file that worked in an entry as my userpic does not create a thumbnail.
I have tried jpg, gif and png, all fail.
Any Javascript errors? Perhaps reinstall? I don't really have any good suggestions--it sounds like ImageMagick is working fine, and I'm not sure what else might affect it.
Nope, not JS errors either. Not really interested in performing a reinstall. I'll have todig out debug mode I guess and if that fails trace the code myself.