I can confirm the same behaviour on 7.04 with network-manager version 0.6.4-6ubuntu7 and network-manager-pptp version 0.6.3+cvs20060819-0ubuntu2.
I followed the steps described by the initial reporter and achieved the exact same result.
I can confirm the same behaviour on 7.04 with network-manager version 0.6.4-6ubuntu7 and network- manager- pptp version 0.6.3+cvs200608 19-0ubuntu2.
I followed the steps described by the initial reporter and achieved the exact same result.