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I don't have an explanation, but I have had issues with CBR files in the past. They may show up in the library but when I would go to read them they wouldn't load. I ended up converting them to CBZs and they then worked fine. I use a simple batch file that does the conversion for you; the one requirement is it uses 7Zip. It will do whole folders for CBRs which is handy. You can find the code here.
Customer support service by UserEcho
Have to agree. If a folder view was added it it would increase the chances of switching.