I have set up a Linksys WRT45GL with Tomato Firmware 1.28. It is used in a hotel, to provide internet access (PPTP tunnel to the modem) for the LAN (with allowing LAN PCs to access each other) and for the WIFI (denying to communicate with the LAN and other WiFi PCs).
It is set up like in the PDF tutorial which I uploaded.
It all worked fine for a while. But recently, the guests notice random disconnects from the WiFi net. After short time, they're connected again. Sometimes, we can't even connect via WiFi. It needs a few Router reboots to get it working again. All this doesn't happen to the wired PCs, so I think it could be a DHCP problem.
Does the log.txt tell you anything?
You can find the files __here__.
For help i would be very very thankful!