I've had issues with modifications in the past that add custom stylevars. The last mod that I installed that added custom stylevars ended up overwriting everything, giving me a completely blank stylevar list:
http://gyazo.com/5a1122bd80167e9f33c...389?1349593243
^The above is what happened to me, and I was told by the makers of that mod that it was a bug with vB itself. I've since restored my stylevars, but will a similar issue occur with this mod?