Having just done a full scan, I see the progress bar is still disfunctional. The scan had done 47GB before the progress bar came off 0%, and then in the last 10GB’s it appeared and struggled toward the end. I don’t really need the progress bar but it would be a convenience if I knew how much longer before the scan is done. 
you could check out the scan report for the time it toke for the scan.
didn’t you get a scan progress when you scanned your computer?
what version of avast 5 are you using the latest?
The time was 1 hour according to the readout on the scan page. As I mentioned, I don’t really NEED a progress bar, but since it should be there, it doesn’t work. I’m using V5.0.667
it works, it’s just almost inactive during the rootkit scan phase, always been like this. Notice that it only shows a count of just one folder as long as that phase is running.