I have been busy with my project for a couple of weeks (or was it months?), and all the work was done under Vista x64, with either Vegas 8.1 or 8.0c, depending on current needs. Apart from the well known intermittent problems with opening project in the 8.1, all my projects run well with either version.
Having finalized (hopefully) the project today, I just thought: why not boot my XP for a while now? - and here I am, with the OS being quite noticeably more agile, but NONE of my projects (saved by the 8.0c under Vista) can now be opened under XP !
Vegas either reports unknown error, or wants me to search for "missing" clip files which are happily sitting in the same locations as before...
Anyone had a similar experience? And no - I never associated the .veg file extension with the 8.1 ...