Since I have upgraded to Leopard (when it first came out) I have been having network issues.
I switched routers at home 3 times and finally found one I could stay connected to. It recently got hit by lightning so now I'm SOL again and will have to buy another one.
But I can solve my issue at home, what is annoying is anywhere I go wireless is extremely spotty. At work I use to connect and bam it worked great, now it connects, I'm lucky if it works and then about a minute later it drops.
It does the same at home, it doesn't seem to actually drop the connection, the mac thinks it is connected (lights on the task bar at the top) but I can't get anywhere (even though I have an IP etc).
If I disconnect and reconnect, it will work again, most of the time though if I disconnect I have to wait about 5 min then I will be able to reconnect and it will work for a minute or 2 and the process starts again.
Never had a problem with tiger
I may have to revert but would rather not if there is a way to solve this.