Version:           1.6.6 (using KDE 4.6.4) 
OS:                Linux

If you have enough feeds that you can even see the progress meter go by the following can happen if the first feed site is down:
The main progress meter stalls at 0% until that feed fetch times out.  Then the meter continues to 100%.  However, if you click the expand arrow next to the meter to show each individual concurrent feed fetch, you can see that the other ones are downloading just fine and each has its own functioning progress meter.  You would not notice this unless you expand the main meter.  If you don't you may think that the whole thing is stalled.  Perhaps the main meter should proceed and then stop at 99% or something appropriate like that so you can see when actual progress has stopped and you are waiting for a stalled connection or a timeout due to a site being down.

Reproducible: Always

Steps to Reproduce:
You must setup a series of RSS feeds and fetch all of them successfully.
Then have one of the feeds be down or running very very slow, preferably make it the feed that gets fetched first during a normal fetch process (you can probably simulate this on your firewall).
Try to fetch all the feeds again and look at the progress meter.
Expand the main meter with the little arrow button next to it and look at the individual progress meters.

Actual Results:  
The main meter is stuck at 0% even though there is progress happening in the background.

Expected Results:  
The main meter should proceed as long as there is progress.