Check in promblems in PDM workgroup client

I am running Solidworks 2007 SP3.1 and pdmworkgroups. Justrecently I chekc out a drawing from the vault and makechanges. When I try to check it back in it tells me that itfound adrawing of the same name in the vault but it is differentfrom thedrawing I am checking in (Duh I made a revision)  Thisis thefirst time I have seen this message.  Is this a problemwithPDM or is it the new service pack?


SolidworksWorkgroup Pdm