Quick update: Having read the earlier comments, I checked which theme I was using and it was also the 'Crux' theme as previously mentioned. Just out of curiosity, I switched back to the default 'Human' theme and the bug instantly went away and format > page worked perfectly.
-- Format > Page crashes Office https://bugs.launchpad.net/bugs/155799 You received this bug notification because you are a member of Ubuntu Bugs, which is the bug contact for Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs