*Update* Over the Christmas Holidays (December 2006) I replaced the unit that my mother purchased with a WRT54G as well. Her D-Link started exhibiting the same symptoms as did mine and was eventually too much of a nuisance to ignore. These things are junk. I highly recommend against buying them.
I’m back using my WRT54G router. The D-Link DI-524 started locking up on me more and more often. I couldn’t even get it to reset using the reset button (hold for 30 seconds and all that).
I’m pretty disappointed with the wireless routers I’ve seen in general. The technology is here to do WEP and MAC Filtering and not broadcasting SSID, but don’t try to do all that at once!
To be fair I think the D-Link was probably just a crap unit. It’s seizures were directly related to whenever I would bittorrent something for a long period of time (maybe overheated?). Anyway, in getting more and more creative in ways to “unseize” it, I eventually just physically broke the unit (the antenna isn’t as strong as I thought it was…).