SBF has had some issues with buttonfacade, particularly due to, to quote a "hackish" approach which tended to break upon patches to buttonfacade.
There has been a fix posted, but it will involve editing of one of the files, and therefore not relying on automatic updates until version 3.2 or 4.0 - whichever it proves to be.
Taken from
http://forums.wowace.com/showpost.ph...&postcount=883
Change line 3 of SBFButtonFacade.lua from:
Code:
if IsAddOnLoaded("ButtonFacade") and (ButtonFacade ~= nil) then
to
Code:
if IsAddOnLoaded("ButtonFacade") then
If like mine, when opened in notepad the lines did not have the line returns, then try notepad++ to open it, even better the portable version if you don't wish to have something installed.
The next major version is supossed to properly fix the support, with the last version being back in july 2009, so lasting this long without addon breaking issues this long has been pretty surprising.
I applied this same fix myself yesterday.