Just an update to my comment #19 (a week ago) - I haven't experienced any of these freezes since I upgraded gtk2-engines-oxygen to version 1.3.3 with the patches mentioned in the Emacs bug report: https://bugs.launchpad.net/ubuntu/+source/emacs23/+bug/1142213. The patches might not be relevant so it's possible that the latest upstream version fixes the freezes.
Just an update to my comment #19 (a week ago) - I haven't experienced any of these freezes since I upgraded gtk2-engines-oxygen to version 1.3.3 with the patches mentioned in the Emacs bug report: https:/ /bugs.launchpad .net/ubuntu/ +source/ emacs23/ +bug/1142213. The patches might not be relevant so it's possible that the latest upstream version fixes the freezes.
I can provide amd64 package if there's interest.