287200 - mouse wheel scrolls more than a page

Status: RESOLVED WORKSFORME

(Thunderbird :: Mail Window Front End, defect)

Description

[guivho]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.7.6) Gecko/20050223 Firefox/1.0.1
Build Identifier: version 1.0.2 (20050317)

I have my mouse wheel set to scroll a page for every wheel notch (I mean turning
it one notch, not clicking). This works file in all programs, including e.g.
firefox and emacs (even in split windows).

My Thunderbird window layout is the leftmost combination in the options box:
folders at left, message list (4 lines) on top right and message body on lower
right, showing 20,5 lines of text.

However a single wheel notch scrolls 28 lines, thereby hiding 8 lines from view.
Anybody else seen this? Can it (easily) be fixed? The scroll bar works as
expected, as do the PgUp and PgDwn keys. But I'd like to use my scroll wheel in
Thunderbird too.

(This is on a WinXP sp2 box).

I have reported this in the Thunderbird Bugs forum, but had no replies. A search
 of the forums did not turn up any reports about this.

BTW: this problem also occurs in the standalone message window.

Reproducible: Always

Steps to Reproduce:
1.open a message that has more lines than the window pane
2.scroll the mouse wheel one notch
3.

Actual Results:  
some lines have been scrolled that were not in view before the scroll; if the
subject/from/date/to header block is collapsed, less lines are missing, but
still it scrolls more than fits one window

Expected Results:  
It should handle teh mous scroll as a pageup or pagedown: leave one line for
continuity, i.e. scroll n-1 lines rather than n+x where ne is the number of
lines that fit in a window. A scroll should never scroll more than fits in a window.

Just installed 1.0.2, and the problem is still there.

Comment 1

[guivho]

I just uninstalled Microsoft Intellipoint 5.0 and the problem is gone. 
As far as I am concerned, this bug can be closed as a non-issue.
I do not know whether I am supposed to change its status nor to what status.
I suppose that 'worksforme' will do.
My sincere apologies for this ms-caused noise!