I have received a number of messages with regards to mods i've made to this forum.
It has been a long road to say the least - YaBB SE 1.5.0 is buggy.
All changes can be viewed here:
http://www.ofpec.com/yabbse/Changes.txtWe started with a clean install of YaBB SE 1.5.0, and a database that was upgraded from 1.4.1 to 1.5.0.
If you have questions on fixing your own YaBB SE board, shoot.