This problem occurs because of a memory leak in the Windows OLE component. This memory leak is triggered by the way that Windows Explorer deals with the extended attributes of the files.
Following the “Out of Memory” message, you can expect plenty of other errors to occur including menus and tabs disappearing within the Windows environment and even reboots and BSODs (Blue Screens of Death) errors. Apparently a fix was scheduled for SP1 but didn't make it. Instead, you have to submit a request to Microsoft Online Customer Services to obtain the hotfix for the problem.