There's been no interruption of the gnutella network size recently, and you know you had a clean set-up for several days after the switch.

I'd think you should not touch anything.
If you're sure nothing changed at your end, might be worth a call to your ISP's internet help desk and confirm you still "have an uninterrupted connection to the gnutella network on port 6346"

Maybe it was just a local temporary interruption of service, so patiently try a few more times and if lucky, you can save some troubleshooting.