Irda connectivity problems since 2.4.20

Hello list,

I recently switched my debian install over from 2.4.19 to 2.4.20. Since then I've been having trouble syncing my Palm m500 over Irda. It works, but the transfers seem to stall a lot, making the total hotsync take over 5 minutes to complete.

The irda transfers work fine in 2.4.19.

These are the messages in the dmesg:

ircomm_tty_attach_cable() ircomm_tty_ias_register()
irlap_state_ndm(), media busy! irlap_change_speed(), setting speed to 115200 irlmp_state_dtr(), Unknown event LM_LAP_CONNECT_CONFIRM ircomm_param_service_type(), services in common=04 ircomm_param_service_type(), resulting service type=0x04 ircomm_param_xon_xoff(), XON/XOFF = 0x11,0x13 ircomm_param_enq_ack(), ENQ/ACK = 0x13,0x11 ircomm_tty_check_modem_status() ircomm_param_xon_xoff(), XON/XOFF = 0x11,0x13 ircomm_param_enq_ack(), ENQ/ACK = 0x13,0x11 ircomm_tty_check_modem_status() irlmp_state_dtr(), Unknown event LM_WATCHDOG_TIMEOUT Framing or parity error!
Framing or parity error!
Framing or parity error!
... lots of framing errors

<here the transfer stalls and JPilot hangs>

after half a minute the transfer continues, only to stall later again.

I'm using the following irda related modules:
irtty irport ircomm-tty ircomm irda

Any ideas?

Thanks!

DK