Comment 26 for bug 779752

Same issue here. I administer a computer lab with 11 PCs (mostly Intel i5 and a couple of i7s. They were updated today to Xubuntu 12.04 64 bits with docky, installed from the Ubuntu repositories, and every computer starts with the docklets loading incorrectly (not showing at all) or correctly in what appears to be a random fashion.
I confirm what Pete Mendoza said: The docklets load just fine after doing a 'killall docky; docky;' but the problem persists after rebooting.
I'll try to get the logs if the problem persists.