ClamXav seems to work well on some folders, but it hangs on others for no apparent reason. Even with small folders containing only small files, it suddenly stops progressing, and keeps reporting "currently checking" that same folder for ever.
This means I can never check my whole Mail folder (1 GB), because ClamXav stops working after 2 or 3 folders. Pretty useless then...
Neither the help pages nor the forums provide any sort of explanation for that issue.