cannot change group name if there is a skype contact in it

Binary package hint: pidgin-skype

If I move a skype contact in a pigin group and then try to change the name of the group via the Rename menu option the change is not applied and the name of the group changes back to the old one as soon as I press enter.

Workaround:
Moving the skype contact into another group, changing the group name and then moving the skype contact back seems to work.

Information:
lsb_release -rd
Description: Ubuntu 10.04.1 LTS
Release: 10.04

apt-cache policy pidgin-skype
pidgin-skype:
  Installed: 20100121+dfsg-1
  Candidate: 20100121+dfsg-1
  Version table:
 *** 20100121+dfsg-1 0
        500 http://it.archive.ubuntu.com/ubuntu/ lucid/multiverse Packages
        100 /var/lib/dpkg/status