I don’t think he’s saying that if you open an edit window, you can always post from that edit window. Rather, the first time it would work as normal, but if the 5 minute window has expired, the edit button shouldn’t work.
The problem is that the edit feature built into the software doesn’t check the time limit. If the edit button is on the screen, it pulls up an edit window. The software check will disable the edit button so it does not appear, but if you have a cached page with the edit button showing, that edit button will work. However, when the system tries to load the page, it verifies the time limit and rejects the post.
Unfortunately, this is a feature of the way vB coded the site, and there is nothing that the Straight Dope can do. Feel free to go to vB website and post your comment there; it may already be a topic there, as we are running a version of the software that is several versions old. We’re running vB 3… and it’s currently up to vB 5… or 6… or whatever.
Back in ancient times, I was connecting via a phone line with a flaky connection (an alarm installed in my apartment but not monitored was hijacking the phone line), I did a lot of composing in notepad for this very reason. That way, my post was cached somewhere. Now I rarely lose a post completely, and sometimes the back button saves a copy. Theoretically, you are correct that it is marginally better from a redundancy standpoint to compose and edit in a separate program, then copy/paste to the edit window and give one final preview pass. However, practically, the marginal gains are – most of the time – not worth the hassle.
But I’m disappointed that neither of you mention this procedure that seems kind of “unfortunate” to me - which is even when the five minute clock has expired, you can still hit “Edit” and the board software will permit you to spend time editing your post. But then, when you hit “Save” it will tell you the time is up.
If the time limit has not expired, the button works. If the time limit expires while you are composing the message, the post will not load. If you use a cached copy of the page that has the edit button, how does the software know that? That is a feature of how vB works and is not something that can be configured by the SD.
I suspect some of what happens with edit windows and back buttons and caching content is browser dependent behavior.