From Bugzilla Helper: User-Agent: Mozilla/5.0 (Windows; U; Win98; en-US; 0.8.1) Gecko/20010323 BuildID: 2001032319 Neither the page up, page down, up or down keys does anything when I'm reading my email at hotmail using Mozilla. Reproducible: Always Steps to Reproduce: 1. Create a hotmail account 2. Receive some email 3. Click on it to read it Actual Results: Page up etc. doesn't work. Expected Results: Page up etc. should scroll display.
I was mistaken - it's not so easy to reproduce. Once the bug has started though it tends to stay until you quit Mozilla, which is what led me to believe it was always reproducible. I haven't found a reproducible test case yet, but try clicking through another site in another window (http://www.drugwarprisoners.org triggered the bug fairly quickly for me), while reading some email in hotmail (long emails might help). Sorry.
This is probably a duplicate of another bug... I can't think of which one at the moment...