Gaddafi has been accused by HRW of cluster bombing Misrata. Really nasty stuff.
And---not to shift the blame at a moment like this---but the obvious cruelty of the way the bombs are being used right now is a good reminder that the U.S. should sign and ratify the Convention on Cluster Munitions (as should Israel, China, Russia and other holdouts).
When cluster bombs have been used elsewhere, such as by Israel in Lebanon and by the U.S. in Aghanistan, the results have been devastating for civilians. No battlefield advantage justifies this.