While everything seems to work at first, FineReader keeps giving error messages that files from within the virtual filesystem cannot be found. This can be either files that were created during runtime (for instance, within %Temp%\FineReader11 while processing/OCR'ing some pages, or even some DLL files within its own program folder %ProgramFiles%\ABBYY FineReader 11, which were virtualized).
It seems that Cameyo (latest beta, and 1.7 stable) cannot pass through the files asked from the virtual filesystem to FineReader, which causes FineReader to not be able to find them at all. In the -Troubleshoot logfile, I can only find at times the 'changed from does not exist to success' entries, but there do not seem to be entries about the files FineReader misses in the log.
(Without virtualization, FineReader works perfectly fine.)