The CR mapping seems to conflict with supertab (https://github.com/ervandew/supertab). When pressing CR in insert mode I get this error:
E15: Invalid expression: ^R=<80>R11_SelectCompletion(1)^M
I've installed the latest github versions of both plugins, and only these an pathogen.
(I opened an issue for supertab too as I'm not sure if the problem is best solved here or there: ervandew/supertab#69)
Fix #46, Incompatible CR mapping with supertab.
Wow. That was fast! Incredible! Thanks.