Short answer is NO.
I have posted this on a number of occasions:
Decompression Bomb, a file that is highly compressed, which could be very large when decompressed. This used to be a tactic long ago to swamp the system.
The name really is the most dangerous thing about this and I wish they would change it or simply not report it, a real PITA.
These highly compressed files are generally 'archive' files which are inert, don't present an immediate risk until they are unpacked. If you happen to select 'All packers' in your on-demand scans then you are more likely to come across this type of thing. Personally it is a waste of time scanning 'all packers' and that is why it isn't enabled by default.
I'm not sure what the other errors are, but are they related to a scan or scans that you have been doing ?
If not, when are these errors ocuring ?
I did a quick search on the later error and that throws up Apple iTunes errors (unrelated I think).
