Hello yes we do not autotranslate custom stylesheets. There is no way for us to autotranslate variables that are not part of a default
vb install
EXAMPLE your images exist here
/forums/images/bbskin/misc/
we autotranslate this directory images
/forums/images/misc/
I would suggest you try in styles admin of that specific style you find in style options the relatative url to the misc directory
/images/bbskin/misc/
and make it a full url like so
http://www.britishblades.com/forums/images/bbskin/misc/