OK.... here we go.
In my 31 years with MTU, we have NEVER experienced what we are now going through. We are months behind on new features as we struggle with the problems of Vista.
I hope everyone has installed 4.02. It fixes more reported problems. However, it is not perfect either. We had a long Engineering meeting yesterday and are embarking on a new direction. With all we now know, we can say that using Windows Media Player and IE together is NOT a good combination. The flashing, crashing, flckering, etc. you are experiencing, we can't get rid of. We have our most sophisticated programmer on this, and after at least a man-month of trying this, and that, and tuther, and other... we've exhausted all KNOWN fixes for WMP+IE. There may be something else, but we're no longer looking for it.
Today, we're taking a new... yet old... direction. It is CLEAR that our older Lyrics player from Hoster 1.000 to 3.321a IS in sync with the audio, did not flicker, did not crash when Duration hit 00:00, and
IS as stable as the Rock of Gibraltar! That my friends, is what MTU has always delivered in the past, and our driving desire to deliver with Hoster 4.0.
We won't quit until we attain stability again.
Mind you, the ONLY problems with our older code was it couldn't handle
Tempo SPEED UP more than about +8%. It went down to -52% without a glitch, but was too old-a-code (not based on DirectX) to go faster. Also, as you know, video files played in a separate window that we are trying to also make into one Show Display. Well, as the President, yesterday I made a "judgment call" after an extended Engineering meeting with my staff.
First, very, very few Hosts or private users have ever asked for Tempo change.
Second, NO ONE has ever asked for SPEED UP. Those who are out for a good time and thus inebriated with "spirits", and older folks... both want to SLOW DOWN so we can see and respond to the slower music.
So, we now expect to retain all the beautiful Show Display 4-screen flexibility, and the Marquee, Singers Names Display, Instabuttons, and Video playing and return to using our older tried and true "Lyrics Render" code that is rock solid.
It doesn't use Microsoft DirectX at all.
It doesn't use Microsoft Windows Media Play at all.
It doesn't use Microsoft Internet Explorer.
It DID work, and it WILL work again in 4.0, including playing videos. 
Lord willing, our Beta Testers will see its performance early next week. Like you, we want to regain stability. I can't sleep at night knowing my customers aren't using perfect code! I WILL restore the faith you have always had in MTU to deliver perfection!
Microsoft is in trouble, IMHO. They should have never FORCED the world to use their "infantile" Vista. It is designed for computer newbies. After 9 man-months WASTED..... yes, WASTED.... we still don't know how to make its components work together!
Hopefully next week we'll have our old code running again... and stable... with the new functions still there.
We have been working on Tempo since last November...on and off mind you. We were trying to bring it to you in 4.03, but alas, it is delayed again to solve the sync problems.
We are working hard and WILL give you a Hoster we can all be proud of again.
Watch for 4.03 coming soon to you, our honored clients!