Hi Jason,
I am intermitently getting the apache "Premature end of script
headers" error. ZF 1.9 PHP 5.2.1 . Refreshing the page causes the site
to function correctly.
This is usually caused by a crash of the PHP module, e.g. a segmentation
fault. In my experience, this is caused by either consuming vast amounts
of memory, or overflowing recursion depth (very deep recursion inside
your script). I haven't seen this error in a long time though, and a
simple upgrade to a later PHP version might solve your problem.
Segfaults usually don't explain themselves easily without hard core
debugging.
drm / Gerard