** Using WeBWorK **

Until we move or upgrade servers our best solution so far is to shutdown httpd for a few seconds and restart it daily around 4am. (service httpd stop , sleep 20, service httpd start)
That has significantly reduced the number of errors received on a per day basis. Currently this particular server is handling 2300 students and I'm seeing less than 20 of these errors per day (homework due M,W,F).
Take care,
Fuzzy