Can't post and slow site

I cant� seem to post comments on a thread I started. I get the error that I�ve included a link or inappropriate content. I promise you neither is true (unless you consider valid complaints about problem with BB inappropriate (now were did I put my copy of 1984)
I know its not my content as I logged out and logged back in and posted a copy and paste of my original and all was well.
I�ve also noticed a slow down with the site. I have to compose responses in another program and paste otherwise I�m waiting for seconds at a time for each letter to appear as I type. And I have a 200mB connection.
This is however after an update to the latest Firefox.

Use chrome