I went through all albums one by one and found a few that did not have the album name spelled exactly the way it is spelled on amazon. For those albums, single album cover fetch simply fails. I also found a few albums for which there is no cover art available at amazon or last.fm. For those albums as well, single album cover art download simply fails. After I went through all albums one at a time, now downloading all album covers seems to be working. Earlier, it would start and pretend to complete way too quickly. Now it takes some time and prints its progress in %. I can't tell if it indeed downloaded any cover since I have already downloaded all the available ones manually.

Another problem I am noticing is canola2 sometimes takes a long time to start up. When this happens, it takes 30 seconds or longer for the canola screen to even appear. Once canola screen appears, it gets stuck at "Starting Canola" for 2-5 minutes. It will then finally switch to "Updating Media Library" and can stay there for some time (>1 minute). This problem was worse with beta8. I have left beta8 running like this for half hour before it got to main canola screen. Beta 9 just did this again. It was still stuck at "Updating Media Library" after 5 minutes of launching canola. Every time this happens, I have found that I can kill canola, start it again right away and it will start normally, i.e. I get to canola main screen in 10-15 seconds.