I'm sure sorry Roy, I don't know. If you have all of the media enabled and updated it seems like it should work. I've seen so many not do the update after an upgrade, you know, urpmi --auto-update...it sure is nice when that fixes things. I seen the other thread and he hasn't replied so we don't learn much there.
If you don't have important stuff to worry about I'd do a new install. I like knowing what the problem was but you may waste a lot of time when a re-install would have you up and running. Then again, if it came up the same way...
Also, the MD5 will verify the downloaded ISO, but you have to make sure the burned copy also matches. One single bit is all it takes. If it is in the middle of a wallpaper you're ok, if it is in a program, not so much.