Internet drops out after sleep mode

Hi everyone,

Since I've installed Lion on my macbook every time i exit sleep mode (open the laptop) Safari claims I don't have internet, while my wifi connection seems to have no problems at all. I've checked under preferences/network and al seems well, my IP address starts with 10 on airport networks, and with 192 on regular networks as it should, but still i don't have an internet connection. After turning airport off and on again everything works fine! I've tried restarting my laptop several times but without effect...

My system specs are the following:

Macbook 3.1 (Late 2007)
2.2Ghz Intel Core 2 Duo processor
4gb Ram
500gb hard drive
Intel gma x3100 graphics

I hope someone knows a solution!

 

Good to know! I hadn't seen any threads on the subject but apparently I was blind or something (I have to say it was 2.29 AM when I sent that) There's more things I think could use some change or improvement.. For instance: Why can't I organise my desktops & full screen apps in mission control? But I'm sure I'm not the only one with that question either...