These have now been fixed in the CVS version, but you can just ignore them.
To hide these sorts of notices (they are not errors, just notices) make sure "debug" is turned off in your Moodle configuration. Admin -> Configuration -> Variables.
Forum
Add forum -> multiple errors in mod.html
Гэтае абмеркаваньне было заблакавана, таму вы болей ня можаце адказваць на яго.