I've been using Firefox and Thunderbird for about a month now, and am really liking the new features that they offer over IE/Outlook express, but I have run into one very major problem. Both of these apps seem to just keep eating memory like there's no tomorrow. I just had FF crash om me with 180 Mb used showing in the task manager (and about 30% CPU). I don't seem to remember IE being as resource-heavy as this. I'm assuming that these concerns will be addressed in a future release? I let the feedback agent do its thing, every time the app crashes, but I have no idea whether this problem can be fixed (I'm pretty sure that the app is written in Java after all).