After opening some files, Dreamweaver MX starts rearranging my source code
without questioning. After rearranging the source has become unreadable due
to changed indents and linewrapping. When I restart my computer all works
fine for a while and then the problems get back.

Reinstalled my PC (Win2K SP4 P3/800MHz/80GB IDE/512MB RAM) and Studio MX
(full installation) but still (sh)it happens.

What can be wrong? Which settings can I verify to see if nothing is set up
to dynamically change my sources?

Thanks for your time.