Hi
One of the main criticisms of VP 3.xx is slowness in creating thumbnails and rendering the changes made to the timeline. The general concensus is that it is probably due to the inability of the slower PCs to deal with the extra data processing required quickly enough for these multi track versions particularly as Borate has checked the minimum RAM required for adequate processing speed and found it should be at least 4 Gigs.(HD mpeg4 clips)
If you are running Vista on a PC like mine...
MS Windows Vista Home Premium 32 bit SP2
Intel Core Duo CPU E4500 @ 2.20Ghz, 2.0GB RAM, NVIDIA GeForce 8600 GS
...it may be useful to remember that you can increase the RAM by using a USB data key of up to 4Gig as a Readyboost.
I'm not sure if later versions of Windows has this feature, but with Vista it's simply a matter of plugging in an empty USB chip into a spare socket and taking the Readyboost option that comes up. The 32 bit Vista can apparently use up to 4 Gigs of extra RAM in this way.
It's something I hadn't thought about and am in the process of trying out. It does seem to show an improvement, so much so that, as I have a new project to deal with I may try editing it with VP3.12 instead of 2.41. (which works OK without the Readyboost chip in place.)
It might be something others might like to try, or give an opinion on.
Nat