It seems that the freeze you're experiencing has the same cause as mine had - it hangs on HTTP connection trying to get printer details or something.
My other symptom was that I couldn't delete/stop/start/whatever some printers from cups WWW interface. Go to http://localhost:631 and to the "Printers" tab. See if there are some "strange" printers or printers you can't modify.
It seems that the freeze you're experiencing has the same cause as mine had - it hangs on HTTP connection trying to get printer details or something.
My other symptom was that I couldn't delete/ stop/start/ whatever some printers from cups WWW interface. Go to http:// localhost: 631 and to the "Printers" tab. See if there are some "strange" printers or printers you can't modify.