Event ID 3019 after installing SP2 on XP

I have a peer-to-peer network of 6 windows XP computers. Ever since loading SP2 I am seeing Event ID 3019 and an occasional Event ID 50 in the log. This (3019) is the “The redirector failed to determine the connection type” error. I know that the knowledge base articles say that you can ignore this error, but I am also occasionally receiving Event ID 50 “delayed write failed” and files are not being copied across the network properly. The MrxSmb is the source for both of these Event ID’s. I guess my question is how do I test this to see if the two are connected. I get this error (3019) every time I open a mapped drive but only the “write delayed” error sometimes. I cannot do anything to stop the 3019 errors either. Just wondering if anybody has seen this with SP2 or knows any suggestions to try troubleshooting.