Selecting Format, Styles and Formatting does not produce the dialogue box. Pressing F11 does not produce the dialogue box.
I can only access Styles and formatting via the sidebar.
Unconfirmed with v188.8.131.52 under mint 17.2 x64.
Windows only ?
Look at attachment 118235 [details] for a workaround.
*** This bug has been marked as a duplicate of bug 83546 ***