QUOTE (OtherNiceMan @ Dec 3 2007, 12:51 PM)

Does mt-check run correctly?
Yes
QUOTE
Is there any information in your server log files to say where it is happening?
Lots of entries about ImageMagick: [Sun Dec 02 00:03:21 2007] [error] [client 74.6.28.210] Deep recursion on subroutine "Image::Magick::AUTOLOAD" at /usr/local/lib/perl5/site_perl/5.8.8/mach/Image/Magick.pm line 42.
This is interesting, because according to mt-check, ImageMagick is not installed.
QUOTE
Do you have any plugins installed?
Only what ships with 4.0.1
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Do you have any CRON jobs running / scheduled publishing?
nope
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Do you get any errors in the web web interface?
Not a blip.