Just check the pitch/tuning for yourself, it is easy to find out if it is working as standard or not.
Play a note on a specific key on the VST, remember the pitch and compare it to the same key on one of the built in synths.
Do this for all other VST synths used in Vestige too as and when you load them.
I am using the current 64bit build of LMMS (never used another build) and bang up to date 64bit Windows 7. Perhaps it is an anomaly with this 64bit configuration and the current build?
I know it isn't an issue with any of the other DAW software I have on the machine.
Slightly more technical: Standard pitch for concert A for piano is 440hz.
My current LMMS set up only seems to allow me to achieve this with Vestige VSTs by changing the pitch setting (which it staunchly refuses to remember, despite storing the numbers!).
If you have no idea what I am talking about play your VST and load up youtube to compare the same keys in this video (right hand section for ease of use):http://www.youtube.com/watch?v=g09JZIZ_SPg
Play along, your VST should be in tune.
Piano1 VST should be identical (if playing on the right octave).
Piano 1 is truly excellent by the way: http://www.supremepiano.com/product/piano1.html