Some songs are corrupted during the MP3 encoding process. This happens very rarely, perhaps with one in several hundred songs.
The way around it is to download a FLAC encoded version of the problematic song. The FLAC versions are always perfect, as far as I've seen.
• Use the
FLAC front-end application to convert the FLAC to WAV format.
• Use
RazorLAME to convert the WAV to MP3.
• Use
MP3Tag to put the tag info in the file, including album art.
Selecting the FLAC download format opens other choices you don't normally see, including 384Kbps MP3, which is the original source format of all their music. Oddly, if you go back to downloading 320Kbps or low MP3s, the extra options disappear, until you next select FLAC for a download.