Yes, We’re Aware of that Crashing Bug
If you’re using NetNewsWire 5.1 for Mac, you may find there are some URLs that can make NetNewsWire crash. One was a link to a Google Doc in a recent post on Jason Kottke’s blog, which was linked to from Daring Fireball.
We have a fix for this in a test build. The fix will be in 5.1.1.