Comment 25 for bug 320057

I'm seeing this today in the latest Thunderbird in 12.04 (seems to have started happening to me more often in the past few months, but perhaps that's due to some server-side change.)

It seems worth pointing out that when Thunderbird freezes with the address field drop-down displayed, the entire X session becomes unusable (due to the drop down menu having some kind of global focus?) until Thunderbird "thaws". So one cannot even go do something in another app while waiting for Thunderbird when this happens. Everything grinds to a halt.

(Also note that per the upstream bug, the "workaround" referred to in comment #24 apparently just has the effect of turning off LDAP lookups, so it is not in fact a workaround at all.)