Hi GrayRabbit,
The code immediately gave me a clue it was copied from Microsoft Office / Word, possibly prior to the new Word paste feature (icon for that on the description toobar). However, even with that feature, you can have a result that may not be the exact same as the original word document. Word operates with an incompatible mark-up language to HTML, and that can cause visual differences and even hiccups like code moved to other than desired location.
The better methods for desktop creation for a later copy - paste to Auctiva are a plain text editor, like Notepad, or a real HTML editor with true HTML and CSS encoding.
This may not explain everyone's problem. It's possible they updated the FCKEDITOR, as part of this update, and that might have it rechecking code. http://www.fckeditor.net/ I do know they (FCKeditor) are constantly working to improve that editor and do have an improved Spellcheck. I'm hopeful Auctiva is working to bring back that feature, and incremental steps create a path.
Danno