compilation domain assembly leak in IDE

We have been seeing memory leaks in the VS Studio IDE 2003 for quite some time now.  We have an open case with Microsoft.  After numerous hang dumps and perfmon logs they finally think they figured it out. 

A bug was reported to them today a compilation domain assembly memory leak when using SecurityPermissions.  We use this in all of our assemblies.  They are working on this now and hope to have it resolved in a month or so.  I will keep you posted.