If I could just get the VNAV to honor my 250 knot speed restriction up to 10000, I'd just about be ready to go have some fun with this plane.  But that is a very essential function.  It just can't seem to do it.  The best it can do is around 270.  Then it continues to hold 270 even after it should accelerate up to 315.  

Really annoying.  I have the plane loaded down with full cargo units and just a handful of empty seats.  I am flying a pretty short flight just between CHicago and ST Louis, so I have only 10,000 gallons of fuel on hand.  I wonder if the plane is just too light to have enough elevator authority to hold 250.  But I am using Climb 2, so that should help.   Even vertical speeds of over 5000 ft/min are not enough to hold 250, even with my derated climb setting.

These symptoms sound like what a lot of people were experiencing before SP3.  I do have SP3 installed (Un-installed 1.2, re-installed 1.2,  installed SP3, both using "run as admin".  I verify version 1.3 in the load aircraft menu "see details".

Also, how the heck do you get the thing to stop opening the CaptainSim website to the SP3 page???!!!  THAT is really annoying!.  I have SP3, so why do that?