Dots in function names

Recent R function names seem to be using CaseOfTheLetters to mark words
rather than dots as was done previously.  Is the use of dots in function
names deprecated, or is that simply a style choice?  Will function names
with dots cause problems in future revisions?

There are, and always have been, problems with using dots because of the 
way S3 methods work.  These are getting worse as more functions become 
generic but are getting better as more methods are in namespaces and thus 
registered.

I don't expect dots to go away any time soon, so the choice between 
name.with.dots(), name_with_underscores(), runonname(), and 
nameCamelCased() is really a stylistic one.

 	-thomas