We have an intranet running Sharepoint 2007 on a single Windows Server 2003/IIS6. On one particular list, some of our users see
System.Web.HttpException 'request timed out' YSOD pages, but the errors don't always occur in the same places. Some users see them when they are using the person lookup tool to select a person, some users see them when they try and save a new entry to the list. Some users get errors some days but not others. Occasionally a user can save an entry to the list without seeing an error page, but the entry doesn't then appear in the list.
Can anyone offer pointers to how I can troubleshoot this problem?