Unrealircd 5 made a change today by fixing the reply, but it seems mirc keeps stucks in /list in progress...

New debug reply:

Code
-> IRC.Network.Net LIST <10000
<- :IRC.Network.Net 421 aiaeggaeihgea :The command LIST has been disabled by the network administrators


Old debug reply:

Code
-> IRC.Network.Net LIST <10000
<- :IRC.Network.Net 421 aiaeggaeihgea The command LIST has been disabled by the network administrators


I don't know what else is the fault here and why it is working on your side and not in mine, If you want further details ask me.