LK, I did a clean install of this to my upgraded test board (6.2.1.1), and I had no problems.
I also wanted to let you know that I created a Multihack file for the modaddon hack that needs to be installed before you install the Spellcheck.
It's at
http://adwoff.com/modaddon.mhp As I've said in numerous posts, I'm taking on the challenge of creating Multihack files to "give back" a little for all the hard work everyone here does with the coding.
I take no credit for the code itself. I am simply following the questions w/in the text files to the best of my ability, and going from there.
I've installed the modaddon hack via the modaddon.mhp file and the spellcheck hack to my test board @
http://adwoff.com/ubb-test/cgi/ultimatebb.cgi