We have four computers (Mac) running CS6 (multiple licenses) and sharing documents via a server. Beginning with CS3, we were not able to spell check a document multiple times. Now, with CS6, three computers cannot spell check ANY shared documents. One computer (the one that created the original document) can spell check anything multiple times. When the other computers try to spell check something the dialogue box opens and you hit "start" but nothing happens, as though there are no spelling errors (which there certainly are). All other computers are able to spell check documents originally created on that computer. Copying documents from the server to the computer's hard drive still does not allow them to be spell checked.