Spark 1.1 unexpectedly disconnects from server

Hi,

Spark 1.1 unexpectedly disconnects from server

From time to time (4-5 times per day)

spark disconnects from server without sending logout to server

(other people see me as if I’‘m still logged in but I’'m not).

Spark askes whether I’'d like to reconnect to server, when I press Yes it fails.

I can reconnect again only after timeout.

Server names are jabber.org and jabber.ru.

PSI and GAIM clients work with these servers without problem from same machine.

Is it a known bug, it there any work around?

Regards, Vitaliy