Since today's update of the AVG Anti-Virus (Free edition) signatures (program version 7.1.407; virus base 268.12.12/462; 10/3/2006), it is flagging DimSaver.scr as the trojan PSW.Agent.CRB
I checked the file TrendMicro Housecall (web version) and it did not find anything, so I think it may be a false positive on AVG's part.