Only problem I've ever had like that was with editing my MM application. I could put more information in, but once it was in I couldn't change it or take it out.
My Writing Thread has this problem, and don't tell me cause it's bloated. I let it sit there in another tab for 4 hours to save its edit and it STILL didn't. I ended up having to post the changes..
Yea i thought it was just my comp happens to me a lot trying to edit my mm topic and it keeps loading and takes forever. To combat this instead of quick edit i went to advanced then submit and it worked