DI 524, which is over 15 years old. I have a few Linksys routers that work much better, but I keep those for when I am travelling (I use them in repeater mode). Other than the "save wireless" bug the 524 works for my home use. By the way, the bug does not show up if using a very old MS Internet Explorer. A modern browser (I use Firefox) will produce the bug. If you are curious, and have access to a 524, you can try this: enable a wireless security (eg WEP), set a password in the wireless security tab. Click Apply, then either log out or just refress the page. The changes will not be saved. This bug has been around ever since I purchased the router, and despite numerous attempts to get it fixed (including myself), it prevailed throughout 2 software updates. I have not tried it myself lately, but I have read that Internet Explorer 9 does not work.
Not much of a problem here at home, since we do not use wireless. Whenever we need secure wireless at home, we use a Linksys router. It is only needed for short times.
Hope this helps...if you need a link to the actual java coding bug, I imagine I could again find it. It involves a call to a non-existant subroutine.
Regards,
Bob
EDIT: Here is a link detail the bug:
http://webcache.googleusercontent.com/search?q=cache:DeYNy8Hd398J:doquent.wordpress.com/tag/di-524/+524+bug+apply+wireless+dlink&cd=27&hl=en&ct=clnk&lr=lang_en