Previously (see here), I had noted some problems that occurred upon performing an upgrade of the drivers for my Dell Intel 2915 ABG Wireless Network Card.
Specifically, I had to downgrade my router from acting as a wireless G router, to acting as a B/G router. This resulted in slower performance (from the router).
I am glad to say that this morning, I upgraded my network cards' drivers (see here) and it seems like Dell finally corrected this problem. I can safely say that the problems that I have encountered in the past have fully been resolved.
The update is for the Intel wireless adapter model number 2915 and 2200. Before upgrading, make sure to backup your 'profiles' that you connect to just in case.
Just thought that I would let you know!