As John (Covoxer) noted above, the issue for the developers with full (left+right) justification is the results aren't necessarily going to display WYSIWYG in all browsers - so they intentionally left the option out.

We are free to use the workarounds noted but be aware those viewing your websites might not be seeing what you are. If someone has the time I suppose they could do some tests with many different browsers and investigate the implications.

Regards, Ross