GS v3.3.0 - CKEditor has problems in IE11

[Cerulean]

Yeah, I'm using the patched_CKE version on some of my sites already, but it's only patched with v4.1 so it's not compatible with IE11.

Tried out IE11 in compatibility mode and the results are:
- v3.3.0 stable: seems to solve the IE11 bugs that I'm aware of.
- patched_CKE branch: editor doesn't render at all.