Made a slight change to css, it seems fine now (might need to ctrl+f5 to see the changes).
Thanks for reporting the problem.
Issue
#24 resolved.
Issue
#40 resolved.
Thanks for the quick fix pony :)
I missed that the my plugin's output would be further parsed by MyBB's code, which resulted in $1 being treated as a regex thingy...
Looks like that's another bug fixed :)