Some vst synths don't fit window

Having trouble with LMMS? Ask about it here.
Ubuntu 14.04 with KX Studio repos

Just did a reinstall after 15.04 worked horribly with vst.
Now I notice that some vst don't fit the windows properly.
NoiseMaker first loads fine but after adjusting a slider/knob the gui jumps to another position in the windows.
I've noticed this with (the awesome) TAL NoiseMaker synth
Image
and the u-he TyrellN6.
Image
Other stuff seems to load fine.

Anyone noticed this.

BTW KX Studio uses a modified wine. Gonna try a VBox install to see if the same problem arrises.

Cheers
Rob

Update
Same thing happens in virtualbox Ubuntu 14.04 with kxrepos and (regular non -rt) wine1.6
I had to install the kxsrepos because there's no up-to-date package in the Ubuntu repos. I tried to download the lmms packages manually but they have several dependencies that are only in the kxstudio repos.
serious odd :/
One thing though:
Have you ever tried any mods/ themes, or is it the default theme?
I use the numix gtk theme with numix circle icons.
Also tried switching graphics drivers for my Nvidia card. Both the nouveau drivers and nvidia-331, no change
I use the numix gtk theme with numix circle icons.
Also tried switching graphics drivers for my Nvidia card, both the nouveau drivers and nvidia-331, no change.
Installed gdiplus for wine via winetricks, no change.
Did a virtualbox install of lubuntu 14.10.
No problems there :-/
upgraded to Ubuntu 14.10 problem persists ... wtf
i would say it s the theme - try to revert to the default theme, and see if you still have the issue?
reverted theme issue persist
made a video of it
https://youtu.be/uIVf9FOeXmk
Please file a bug report
https://github.com/LMMS/lmms/issues/new
remember to add all relevant info:
* OS
* lmms vers
* hardware specification (ram & soundcard is the most imortant)
* if any -screenshots of error
* if relevant, demo mmp
* names and best download links of the failing vst's
and the link to your video :)