Consistent clamav error

[MR ZenWiz]

I thought I'd run the latest ClamAV on my system for good measure.
The first output that shows up is this:

ibClamAV Warning: PNG: Unexpected early end-of-file.
LibClamAV Warning: Bytecode run timed out in interpreter after 10000 opcodes
LibClamAV Warning: Bytecode 22 failed to run: CL_ETIMEOUT: Time limit reached

I don't understand what this means.  It doesn't say what file it's
referencing, if any, and it looks like an error in the library.

Can anyone clear this one up for me/the curious?

Thanks.

Mark