254327 - "Down" key in drop downs goes down 2 items, up goes up 2

Status: RESOLVED DUPLICATE of bug 219706

(Core :: DOM: UI Events & Focus Handling, defect)

Description

[Jeremy Bowers]

User-Agent:       Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.7) Gecko/20040705
Build Identifier: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.7) Gecko/20040705

In a XUL dropdown (<xul:menulist>), pressing the Down key on the keyboard goes
down two items instead of one, similarly for up.

This can be a serious accessibility problem, as dropdowns with even numbers of
elements leave half of the items inaccessible by keyboard that I can see, and
dropdowns with two elements appear to ignore up and down (when it is actually
just wrapping around).

Reproducible: Always
Steps to Reproduce:
1. Open Edit->Preferences->Appearence->Fonts, drop down the "Fonts for:"
dropdown by clicking on the dropdown arrow.
2. Press "Down".
Actual Results:  
The third item is highlighted.

Expected Results:  
The second item should be highlighted.

This has been confirmed on Gentoo Linux w/Mozilla 1.7, and Fedora Core 3 test 1.

I'm marking this as "major" because of the way this eliminates a lot of options
for keyboard-only users, and the pervasiveness of the bug. I tried using the
keyboard to type the desired option but that acts erratically and it isn't a
viable workaround.

Comment 1

[Logan Ingalls]

I'm seeing this also in yeasterday's nightly under Crux Linux 2.0
Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.7) Gecko/20040803 Firefox/0.9.1+

Comment 2

[Jeremy Bowers]

*** This bug has been marked as a duplicate of 219706 ***