Never use both Internet Sharing and Web Sharing in Mac OS X Leopard

The poster of this Apple Discussions topic experienced interference from Internet Sharing while he tried to use Web Sharing. I had it the other way around: my Internet Sharing failed to work because of Web Sharing. I use the latter for some web development and testing (mainly PHP) and today I tried to set up Internet Sharing (I wanted to share my wired connection through Wi-Fi with my mobile phone). The symptoms were these: the phone could successfully connect to the Mac's Wi-Fi network, got an IP and could even access the Apache webserver that was running on the Mac. However it could not access internet sites. Once I stopped Web Sharing, the phone could access the internet just fine. The conclusion: Internet Sharing and Web Sharing cannot work simultaneously in Mac OS X Leopard. Sad