I just came across a forum entry on OTN „Possible trojan with 11gR2 Windows 32-bit client on OTN?„. It seems that some virus scanners are reporting a potential trojan in the 32bit client of Oracle 11R2.
According the Eric Maurice from the Oracle security team it is a false positive of the Avira Antivir scanner engine.
It is good to know that also large software vendors are running in this problem of false positives. This can be really bad for the reputation of a software vendor.