Programs that request lots of contiguous memory may fail after you install security update 921883 (MS06-040) on a Windows Server 2003 SP1-based computer. It appears that the problem occurs if you use programs that require one gigabyte or more contiguous memory the programmay fail with an unexpected error after you install security update 921883 on a 32-bit Microsoft Windows Server 2003 Service Pack 1 (SP1)-based computer. For example, programs such as Microsoft Business Solutions - Navision 3.7 may fail.

Microsoft has a temporary hotfix available but recommend that it only be installed if you have a severe problem.  Otherwise they recommend waiting until service pack 3 when the additional testing has been completed.

Hotfix available for contiguous memory problem.