[Wine] Serial port not working anymore on Garmin Mapsource

[Xavi]

I have Garmin Mapsource v8 working 100% with Wine and Linux kernel
2.6.16. Transfer from/to the GPS connected to a USB Serial converter
on /dev/ttyUSB0 works 100% also.
But then, I try with kernel 2.6.18 and 2.6.19 and Mapsource doesn't
find the GPS. It's not a Linux issue as I can access the GPS with
minicom. Device file permisions are OK.
Anyone has and idea of what can be happening here?

Thanks
Xavi