Now just hold on a minute here. If you disable the UOP, do these rocks stop floating? If so, where's the bug in Ancient Yews? You can't just call anything a bug! A bug in a mod is an issue which exists even when the mod is the only one active in your game. If the problem only exists when another mod is active, then it isn't a bug, it's a conflict.
You're right, better calling it a conflict. It's just that UOP it's a must have that everybody still playing to Oblivion use, that I considered it a "standard" patch
For map coordinates, open the console and type tdt then click on one of the rocks before taking the screenshot. This will give coordinates of the rock's location, plus the Form ID of the rock. Once you have given us this info, we can note it down and if AY gets another release, these rocks can be edited to override the conflict.
What does it means (see sshot)?
http://a.imagehost.org/view/0915/Oblivion49
How do I translate them in coords like 60,-48 for the TES-CS to edit the cell?