on my mac, ctrl-drag does not work the same as it does on windows - if i hold ctrl down,
the drag does not even start.
holding down command key, or option key, rather than ctrl, results in just a normal drag.
i talked a a little bit about this to kiheru in chat, and will try to identify what is the correct
modifier to use on a mac.
osx 10.6.7, java 1.6.0_24