As also suggested on
[stackexchange](http://tex.stackexchange.com/questions/112526/errors-wit
h-makeuppercase-and-beamers-insertsectionhead) the new implementation
patches `\sectionentry`, `\beamer@section` and `\beamer@@frametitle`
instead of expanding them.
In the process I also added three more hooks:
- `mthemesectiontitleformat`
- `mthemeframetitleformat`
- `mthemeplaintitleformat`
So the user can change the behavior of each element independently. As
default the new formats are dependent on `mthemetitleformat`.
For testing purposes I integrated @elliottd s frames from this PR #94
This should fix the `allowframebreaks` issue for real now.
\CharacterTable checks against text encoding errors, which was more common when files were typically distributed over email. Now package distribution is done with better tools and modern packages can safely omit \CharacterTable.
http://tex.stackexchange.com/a/42604
