Unable to Save

I am working on a project that appears to let me save a few times. Then after a while, it just sits there and says serializing window. After that goes away, when checking the Client, the new changes have not been applied. To deal with this, I have had to exit the designer and reopen it to make any more saves.

Anyone run into this?

I did have this problem in 7.7.6rc1, it was fixed in the full release of 7.7.6 so I suggest upgrading to that if you can.