Has anybody found a way to change pivot location in the UV Edit SOP? "Insert" key, doesn't work, orientation picking only translates the selection, and modification of px, py and pz parameter doesn't have any effect whatsoever.
For the time being, my workaround is to edit UVs in world space as Pand move Pdata to uvafterward. Somewhat ridiculous, but at least I can manipulate the pivot of each selected UV island.