If you try a search on Kayak, and the search appears to begin normally, then you get a blank or rubbish screen when the search completes, it's possible you have a web accelerator, proxy, firewall or pop-up blocker that is corrupting the results coming back from Kayak.
The best workaround for these problems is to disable or upgrade your proxy software to a newer version. Alternatively, you can disable the software.
If upgrading doesn't help, or if you are unable to disable or bypass the proxy/accelerator/whatever, you can bypass them by using this link:
http://secure.kayak.co.uk
This is the same as the regular Kayak link, except it is "https" instead of "http."
We welcome reports of problems and success in overcoming these troubles. If you can find out the model and version number of any web accelerators (etc), please send it to us via feedback.