Reply to posts problem?

I post 99% of the time on this forum and with the new changes I now have a major problem when I try to reply.  I click on Reply and no problems, I type in my first line and then when I hit the Enter key to start another line every thing locks up to the point where IE8 needs to close.  Anyone else have this issue or know of a fix?  As you can see I can only type one continous line to be able to post and reply.   Bob P.