I used synaptic to lock the version of pidgin-data - how can I change the status from hold back to normal, so that it gets upgraded properly?

The PinningHowto says that doing an apt-get install packagename should remove the hold, but running dpkg -l | grep ^h still shows it as held:

hi  pidgin-data                                                 1:2.10.6-0ubuntu1+pidgin1.12.04                            multi-protocol instant messaging client - data files

How can I properly undo the hold status?