I have different version of Qt installed: Qt for Symbian 4.6.3 and a build from current git branch 4.7.0. Both contain the respective documentation.
When I hit F1 in Creator's Cppeditor to get context help, it shows an old documentation page from 4.6.3 instead of a current one from 4.7.0. Removing the old docs using the Options dialog does not solve this as they are being added again once Creator is being restarted.