Google Docs not there yet

For a collaboration tool, our group decided to give GoogleDocs a try. There were a few glitches at first - the requirement of having a GMail address to log in with - but eventually, we had a document that multiple people could edit. It had some cool features like only allowing one person to edit the document at a time so no-one's changes got over-written and an author/timestamp on changed sections. At first blush, I was pretty happy with it; today, not so much.

All day I have been trying to make changes to a document created by one of my classmates and all day, I've been getting the following error message:

Of course, I have no problem editing/saving the document I created, only saving the shared document (so it's not MY network that's having problems). Not to be so easily stymied, I searched the Google help forum for suggestions. I found a number of posts alluding to this problem - it seems to have plagued GoogleDocs from day one. Sure, I didn't pay anything for it but, it seems, you get what you pay for.