[orca-list] Thunderbird launching very slowly if Orca running. Why happening this?

[Hammer Attila <hammera pickup hu>]

Hy,

In Ubuntu Oneiric I see performance decreasing with Mozilla Thunderbird 
if Orca running. Possible happening this problem only me because my 
Inbox folder have 2226 messages.
When I launch Thunderbird, I need waiting about 30 second before Orca 
begin spokening inbox folder related informations.
I looked Ubuntu Precise this problem are fixed or not, unfortunately the 
problem is reproducable.
The Precise awailable Thunderbird package version is 9.0~b3.
Anybody known a workaround this problem related until this problem is fixed?
This problem is at-spi-2, Orca or Thunderbird related issue?
I using Thunderbird 3.1.15 my Lucid system, but not tryed compiling or 
installing this Thunderbird version my Precise system yet.
I reported Orca level this problem prewious with following bugreport:
https://bugzilla.gnome.org/show_bug.cgi?id=660218

Attila