You're mixing tabs and spaces, C::B source is all spaces and you've not increased the SDK version numbers,
but you've changed the API/ABI for the ProjectManager. The SDK version numbers are in cbplugin.h.
Edit:
For the patch generation, goto the root of the working copy and execute "svn diff > my.patch".
This is the most robust way to generate patches. I've seen tortoisesvn mess up the patches it creates.