561609 - Scrolling during "Move Down" or "Move up" very erratic in Filter app.

Status: RESOLVED DUPLICATE of bug 444793

(Thunderbird :: General, defect)

Description

[William Babb]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.2.3) Gecko/20100401 Firefox/3.6.3 (.NET CLR 3.5.30729)
Build Identifier: 3.0.4

Open "Message filters" on large (>40) list of filters.
Select top filter and use Alt-D to move it down the list.
Hold Alt-D to repeat move.
List scrolls smoothly for first screen then becomes increasingly erratic, jumping up and down the list.
If editing a filter with a long list of operands T-bird tends to eat a lot of CPU time (40-99%) and must be shutdown by task manager to get control of system back. Scrolling freezes.

Reproducible: Always

Steps to Reproduce:
1.See above
2.
3.
Actual Results:  
Move down eventually completes if patient.
Filter edit scrolling freezes and effectively crashes.

Expected Results:  
Should have scrolled smoothly in both situations and not started saturating CPU to the point of being useless.