Bug#422675: Bug still occurs in 2.6.26

[Chris Carr <rantingman@gmail.com>]

I have recently found this problem on an old socket 7 machine with an 
SiS900 network card. The lspci output for the card is

00:0b.0 Ethernet controller: Silicon Integrated Systems [SiS] SiS900 PCI 
Fast Ethernet (rev 02)

The motherboard is a PC Chips (Hsin Tech) M537DMA33:

http://www.users.zetnet.co.uk/thorfin/motherboards/mb01/motherboard_1.htm

Kernel is 2.6.26 from the Lenny RC1 installer.

I'm afraid I don't know how to troubleshoot this bug. For example, 
earlier messages mention setting the card to half-duplex mode - should I 
try that, and if so how is it done?

I don't seem to get as many of these errors as the previous reporter, 
but enough to notice in the logs.

Grateful for any help,

Many thanks,

Chris