1.6 losing networking?

I’ve had this bug a few times, and I can’t figure it out, so I ask if anyone else has had this.

Occasionally, when browsing, it suddenly acts as if there is no network. No response when connecting to a server. To my surprise, closing Mozilla, and reopening it fixes it. Has anyone seen such an issue with the nighties lately? This has been happening to me for a few days, and I would like to get a bug on this if at all possible. I’m going to turn on some logging and try to get this figured out, but any info from others who may have experienced this would be greatly appreciated.