Under Windows XP w/ SP2 the network constantly polls time-out unless I "repair" the connection and confirm connetivity with a tracert to the gateway. The host OS (Mac OS 10.4.8) responds normally during this guest OS VM hang-up and reflects no apparent network related issues. The whole "MTU 1500/9000" trick does not resolve this issue, either. This is new. Fix it. Thanks.
No really - this is an issue I can repeat across several other installations of Mac OS 10.4.8 and Parallels 1922. Really, fix it.