Do not load Amssymb unconditionally
Could you please make the loading of amssymb in beamerbasefont.sty optional? Amssymb clashes sometimes with other font packages, and you'll get errors such as
! LaTeX Error: Command `\mathfrak' already defined.
I'm having this issue with a handout class that uses MinionPro.sty (when loading beamerarticle.sty).