I have also noticed this issue.

The 2 huge problems I have with it is that if you have person (a) edit a file in Firefox and justify all the paragraphs in the document (put in as style="text-align:justify;"), then person (b) comes along in IE and wants all the paragraphs to be left aligned (<p align="left">) the changes will not take because the inline style will overide the align attribute. This problem can be solved by limiting the browser since in my case this is for an internal application, but this is not ideal. The second problem is that the browser I would be forced to limit my users to is IE, and IE uses the align attribute which is deprecated in xhtml 1.0, and removed altogether in xhtml 1.1.

I have advised the company I work for that we should not purchase this product until we find out if these issues will be resolved