Password problems after Leopard Upgrade

Ever since I have upgraded to Leopard, I have noticed that I now need to enter passwords more frequently. These include wep and vpn passwords. For example I know that my keychain contains the wep password for my office router, because I open it up and copy it when it asks me for it when I connect. I do check the remember password option, but still nothing.

For the VPN it always asks for my office password without any box for adding to my keychain, which it is already there from when it was tiger. I never had these problems when I used tiger. What gives?