Yes - 3.1.2, just updated yesterday.
Today I thought I might try converting it with Calibre. But before I tried that I decided to see how Calibre displays it. Guess what. Its FLAWLESS. Why bother? The only problem with Calibre’s reader is that I can’t change the font style, though just about everything else works fine. It does scroll side to side which takes some getting used to but is a small price to pay for no errors.
I should say Sumatra displayed the epub with no errors but its just not big enough for my eyes to read for long periods of time on a 24" widescreen monitor. Mobipocket displays it with lots of errors though you have good control over font style, size and everything else. Mobipocket’s weakness is a bizarre implementation of FullScreen that traps you there until you leave FullScreen. When oh when will techies realize that being different is not better? Improving something is better. But a mindless change to be different is just stupid. Common sense: The sad lacking feature of most tech these days from designers not living in the real world around them.