I have a 1.5Mbps internet connection and I'm using a router to connect the laptop "wirelessly".
The inpiron 1520 is installed with two OS Vista and XP Pro SP3.
When working with Vista all works well - testing my browsing speed shows goos results.
But when working with the XP OS the browsing speed drops down to about 600Kbps. This is not the case when i am connected to the router with a LAN cable (i.e. - not connected wirelessly)
Please note that when working with Vista i am also working wirelessy - and everything is OK.