Not sure if anyone else is having these issues, but the screen shots tell the story.
My Description is all HTML code and the SEO Ttitle also embeds code. (see screen shot below)
I can edit the SEO Title, save it, but when I go back in the edit mode, the Title reverts back to embedding the code.
I have 9 active gigs but this problem only exists in a few gigs – not all 9 (at least for now).
You may want to check out your gigs. Since the SEO Title Issue, my gigs dropped in ranking.
I reported it to CS, but if it is a site wide problem the more people who report it, the faster it will get fixed.