I was able to write posts and manage categories this morning up until about 0730a.m. eastern time…..since then I’ve been getting the 503 error message….the fact that this issue has reamined unresolved for so long without even an inkling of what’s causing it is very disappointing…..
Sorry, a bug slipped in that could cause the 503 error when you add a new category. I just deployed a fix so it should keep it from happening again, but if it’s already happened on your blog send in a feedback and we’ll fix it.
To clarify, this problem would manifest itself by a 503 error on your post page and the categories page. (Caused by an infinite loop.)