I have a DLink 650+ and was having all kinds of problems with it including BSOD followed by an unrequested reboot. A lot of times my pc just failed to determine it was present in the PCMCIA slot. In the end it turned out to be bad hardware and I am having replacement shipped under warranty.

It is possible I brought this on by putting the laptop in my briefcase with the card in it causing occasional stress to be put on the part of the card sticking out of the laptop (the plastic part) so it is possible I damaged the card rather that it being defective. I put in another older 802.11b card I had and it ran great and caused no problems.

When I get the replacement I will not transport the laptop with the card in and see how it goes.

this is all FYI