Hi, Jon.
While some users have reported compatibility problems, so far as I know, most have not.
During Vista's lengthy beta period, I tested several successive builds of both the 32-bit and 64-bit versions of Vista, starting in about August 2005 and continuing through Vista's RTM in November 2006. I've continued to run Quicken on Vista (mostly Ultimate x64) to the present. I installed (many times!) and ran Basic or Deluxe versions of Quicken 2005, 2006, 2007 and now
2008. While there were a few glitches (mostly with initial installations or with automatic installations of Quicken Releases), all versions of Quicken ran well with all versions of Vista.
I do not claim that there was perfect compatibility, or that I did not have frustrations sometimes. But, all in all, Vista had fewer problems with Quicken than with Photoshop or Nero or several other applications during the transition period.
This was with all-USA products, as I said, and I have no experience with UK versions of either Vista or Quicken. Your second link is not dated, so far as I can see, but it seems to have been written soon after Vista was released over a year ago, and the author was using it on a computer with only 512 MB of RAM, which is barely adequate to install Vista. That article includes this assertion:
"Vista won't run Quicken
"Intuit, the manufacturer of Quicken, stopped releasing UK versions of Quicken after Quicken 2004.
"But versions of Quicken up to and including 2004 will not run on Windows Vista. (You can install them, but they won't run)."
I have no way of testing whether that assertion was true, or if it is still true today. If you have information about the current status of Quicken XG
2004 and Vista, could you please update us all?
RC