Yes, Gaddaffi's side also appears to have been using cluster bombs. But it just seems they aren't the only ones.

Like the United States, and a handful of other countries (eg Israel, Russia, China), Libya has not ratified the International Convention on Cluster Munitions.

The other countries involved in this war have signed the Convention, so it would be illegal for them to use cluster bombs. However the Convention was specially modified to make it legal for counties which have signed it to cooperate militarily with non-signatories who use such weapons.

So that's all right, so long as the only NATO people using these weapons are USA...