On a number of occasions lately, various files (including mtview.php, atom.xml, rsd.xml, and template files) have had their permissions changed to 666 (read/writable to world.) All the files that are affected change at exactly the same time. Is movabletype doing something (messed up) that I'm unaware of?

It appears that when templates are changed and rebuilt, movabletype changes their permissions to 666. Why is that? Can it be prevented?

When MT rebuilds your weblog, it sets file and directory permissions according to the following mt.cfg Configuration Settings:

DBUmask
HTMLUmask
UploadUmask
DirUmask

HTMLPerms
UploadPerms

Thanks, Tweezer. It only took me a minute or two to fix it after looking at the mt.cfg. =)