Do error messages matter?

[Spoon]

Likely a sloppy program wrote the files and did not follow the standards, those warnings can be ignored mostly.

[DigitalLA]

After doing a batch-convert from AIFF to FLAC, I received warnings, for multiple files, that an AIFF chunk has uneven data bytes and is non-complaint AIFF; that something "must be extra data on end of file"; and that chunk is out of AIFF area (but still inside file), but in each case Batch Converter reported that "Audio File Passed Verification." Did the conversion go wrong, or is everything O.K. since it reported that the audio files passed verification? Thanks.