I have a refurbed 10v which has the older 1397 wifi card in it and a A04 bios.
OSX and W7 was working perfectly once installed but now they both exhibit wifi issues.
OSX will work for a few minutes then stop altogether, turning airport off then on will restore things until the next issue which can be seconds or a few minutes!
After this I booted up W7 and wifi seems really really slow on this.
If I drop to the the cmd prompt and do a ping -t localip it drops one or two packets every 4 or 5 iterations.
This is obviously what is making the wifi appear slow.
The router is a DG834PN with the latest DGTEAM FW on it.
This all points to hardware for me, but I thought would post this before phoning Dell.
The wireless worked 100% for the first week or so of ownership then this happened.