Hmm, the proper cleanup of temp files is something we fight all the time… Avast now features about 20 independent unpackers and to keep them all clean up things propertly is not easy…

I’d need more info: are you sure that this particular eicar is related to the one you sent via email? (I mean, you are appearently doing a lot of experiments so I want to make sure that it’s really the MIME unpacker…). Maybe a retry of that ‘test’ would be useful…

Thanks
Vlk