I've encountered issues posting comments or answers numerous times over the last month, I've narrowed it down that it only occurs when I use UNION and ALL next to each other (ie SQL). If I separate them by a dash it works fine.
The error is always generic: 'An error occurred during ____ submission' The blank being either comment or answer.
Someone suggested I post this question here. I do not see a similar question, interestingly even trying to search the site for UNION and ALL errored, similarly separating them with + returns an error.
This occurs in Chrome or IE, on Win 7, will test tonight from personal machines.
UPDATE: Apparently through good coincidence I just never had attempted to use UNION ALL when answering questions from home, works fine here. So it must indeed be some firewall/policy setting at my office with very specific criteria, never found any other code bits I couldn't post, and don't have a problem with UNION ALL on other sites. Still interested to find out how it's being blocked given our high level of access.