Hey sixers
This really doesn't surprise me. I've had several dlinks and they all had really really bad glaring issues out of the box.
I've been fighting with reboots, connection drops, poor performance, and confirmed bugs for about a week now (I have mostly got them ironed out, finally).
Anyways, I'm going to cautiously suggest that you try some of the things I've tried, even though you are only having switch troubles.
The first is, I found my router to become VASTLY more stable as soon as I upgraded the firmware to 1.21B02 . I don't have a link for you, and its not the 1.21 available on the support site, but I got the link from this forum so I'm sure with a little searching you'll find it. If you can't, post up and I'll search it out.
I have also heard many many many people praise 1.11 as much more solid than the later firmwares as well, although I have not tried it.
The second suggestion is that you go through the router and turn OFF all enhanced functionality. SPI, mac filtering, QOS, WISH, wireless radio, the "INFO" logging option, etc etc etc etc. We're just testing it as a switch so we want to eliminate the possibility that a hiccup in one of these modules is going to disrupt your data stream.
Anyways, good luck. You may be able to find a way to 'work around' the routers limitations on the PC/nic/etc but that doesn't mean the router isn't the problem. (as you've sortof proved already in one instance).
Cory