A new issue has cropped up for me. I created a new entry. As always I use a format of none. This entry, like my others has some html tags that I typed in. However unlike past entries, MT is converting the angle brackets around my html tags to the html ampersand codes. Older entries do not do this. I don't know how this started. There has probably been a minor upgrade a some point via Debian but not major version change.
Reported on Movable Type 4.3