Hi All
By the sounds of it, them asking you not to send anything else but the card back means they'll be sending you a replacement, not a refund.
If you haven't sent it already, I'd be verifying with them that it is being returned for a refund and not an exchange or warranty claim.
At the moment the mods for the Dual Express haven't been finalised. That should happen this week. I've been giving one a good flogging and so far not a glitch or a hiccup.
Checked it with Dvico's own software as well as Media Centre on Vista32.
Dvico are planning to modify all existing stock with the mod and all future productions runs as well of the Dual Express card.
A quick word regarding Vista SP1. There's copies of the RTM version floating around on the net. It's going to be a repeat of the XP SP1 saga. You may find some software won't run properly after SP1 is installed. I found out the hard way over the weekend

One of the things to change in SP1 is the way video rendering is done, so don't be in too much of a hurry to get it. It may cause more problems then it fixes atm.
Another pain is that SP1 can no longer be slipstreamed into an existing installation disk, like you could with XP. Only VLM end users will be given a slipstreamed capable versions of SP1 on disk. Vlite isn't planning on adding the feature either.
On a positive note, with SP1 installed, Media Centre works great with both the Dual 4 and Dual Express cards
Regards
Mike