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Originally Posted by Greg Findley

Point number 6 on here might be something to do with it? Thats the only thing I can think of from what you have mentioned... http://wordpress.org/support/topic/164999

Theres a few other issues and answers on this WP thread if that doesn't solve it for you Admagic... http://wordpress.org/support/topic/172062

Thanks greg...you are a star....



The actual solution was in point 2 on the WP support site and it was this:

"Also remove any files from the /wp-content/uploads/js_cache directory on your site. This may fix problems with the visual editor as well."

That is the reason it was affecting several blogs on different hosts.
I used to use the "tiny - mce" editor plugin on these sites because it could clean up word files, although have disabled it in recent times, and it leaves a java script that it seems fights with WP 2.5.1