User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.6b) Gecko/20031208 Build Identifier: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.6b) Gecko/20031208 When creating a CSS select:hover rule, the dropdown SELECT element ceases to function : it does not react to either mouse clicks or keyboard events, hence rendering data entry impossible. Reproducible: Always Steps to Reproduce: Add a non-empty CSS :hover selector rule to a SELECT element. Actual Results: SELECT element cannot be operated anymore. Expected Results: Mouse and/or keyboard event dropdown and select. As I did not experience this in Mozilla 1.4 and prior versions, I consider this a regression ; Mozilla 1.5 was not tested. The erroneous behaviour occurs with both the mozilla-i686-pc-linux-gnu-1.6b.tar.gz release and with a fresh custom compiled Mozilla 1.6 from source tarball. Considering that : 1. this is a regression, and 2. all our web applications use the :hover selector behaviour to give visual feedback on active form fields, hence this bug preventing our clients to upgrade to 1.6, I took the liberty to set severity = 'major'.

*** This bug has been marked as a duplicate of 163503 ***