I also observe this problem, now in KDE 4.4 (via Kubuntu Lucid). Basically creating new accounts fails (hangs), although it's possible to configure the modem. After a few tries I managed to get it to work manually, but 3 times out of four it simply hung on the "create new account" step.
Incorporating kppp's functionality into the network manager would be a perfectly good solution IMO.
I also observe this problem, now in KDE 4.4 (via Kubuntu Lucid). Basically creating new accounts fails (hangs), although it's possible to configure the modem. After a few tries I managed to get it to work manually, but 3 times out of four it simply hung on the "create new account" step.
Incorporating kppp's functionality into the network manager would be a perfectly good solution IMO.