Hi Alex,
I really appreciate the response back. The issue is not saving the cover art (and tags) I already have - I've got that somewhat figured out. It's tedious process but seems to work well... (I'll explain my re-rip method at the end). I just happened to discover the issue during this re-rip process because while I still have the .mp3's on my computer I am also re-ripping in .flac - so I temporarily have duplicates on my computer and it became quite clear that Lookup is not finding cover art like it used to.
So, now that I am aware of the problem the real issue is when I rip new CD's that weren't on my computer before, many of them will be without cover art. I hope I explained myself better this time...
Now, (nothing to do with this issue) in case you're interested in how I am replacing my .mp3's with .flac's and saving all my tags & cover art... here's my methodology:
1) In each of the respective .mp3 and .flac folders for the same album, I highlight all files and Rename the "Filename (name)" to exactly the same - such as [Track#] or something simple... (click on Tools>Libary Tools>Rename, Move & Copy Files to do the rename)
2) In MC15 I select all of the .mp3 files and do a Tools>Library Tools>Find/Replace (.mp3/.flac), which renames all .mp3's to .flac's.
3) Then in Windows Explorer I open two windows - one for each folder and I copy the flac files into the .mp3 directory overwriting all the original files.
4) Back in MC15, I highlight all the new flac files and click on Tools>Update Tags from Library, then Tools>Update Library from Tags.
5) When all is done, I highlight the new .flac files and click on Library>Rename, Move & Copy Files>Filename (revert to whatever rule you were using before).
6) Highlight and delete original .flac files and that were imported into temp file making sure to also remove from disk (these should appear as duplicates).
Thanks,
Susie