Git commit error "Aborting due to empty commit message"

I am having difficulties in committing changes using Git. I am using RubyMine 1.1 on OS X 10.5.7.

From the menu I choose Version Control | Commit Changes. I see a list of the changed files. In the Comment field I enter a comment. When I click Commit I see the following dialog:

"Commit failed with errors"

The commit changes message is: "Error: Aborting commit due to empty message."

What do I need to do to be able to commit? When I do the commit on the command like "git commit -m "My commit message"", it works.

Any help would be appreciated.

Cheers.