I think this is a bug, but every time I insert a table it inserts an invalid format--> The title tag is inserted under the tgroup element instead of above it. And the structure is automatically marked invalid. I tried deleting the title element and it wont let me unless I go into the code view and delete the title tags.
I've also had it do this and there are no title tags in the xml at all, and then when I place them in the correct location in the xml and switch back to wysiwyg then the structure is fixed....
Has anyone else seen this issue?