Recurring error - The incoming tabular data stream (TDS) protocol stream is incorrect. The MARS TDS header contained errors.

Not sure if this is the right forum for this question, but my closest searches (thought disappointing) have suggested it is probably a SQL-related issue.

We're getting this error once every other week or so on an ASP.NET application built on .NET Framework 3.5 running against SQL Server 2005.  I can't find much info on this error, but we are up to date on our SQL Server service packs.  When we get this error no one is able to make a connection and we end up having to reboot the server.