lmms version?
0.4.11 has just been relased -i tested it thourughly. it loads even the 'heavy-one' (DSK Pads*) fast and reliable -and also projects with embedded vst's.
Remeber that the right way to load existing vst is:
http://lmms.sourceforge.net/wiki/index. ... _with_VSTs
(read last paragraph)
* dont misunderstand -DSK-pads is a wonderfull instrument -but.. It actually uses ~800 MB!! and bloats paging chockingly