I'm on MacOS 10.6.8 with Firefox 6.0.2 – Firefox tosses up occasion Java login windows, depending on which pane of the D-Link supervisory browser pages I might click. Even worse, Firefox is unresponsive until the password window comes up, sometimes many minutes.
Very frustrating, as sometimes I've tire of waiting for the camera to respond and I'm off in another tab trying to do something.
Another thing – if I have a (not necessarily frontmost) Firefox tab displaying mjpeg.cgi or video.cgi or any of the other live views, Firefox randomly throws out a request to save a file of that name, e.g. mjpeg.cgi - these files appear useless, as they are not readable by any program I can find. At least this thing does not freeze Firefox.
Both of these issues happen with DCS-932L and also with DCS-930L.
Have not yet gotten as much experience with other browsers, but I haven't had so much trouble in Safari, Chrome, or Stainless.