ASP.NET events can cause troubles
Recently a new version of the Webrichtlijnen on-line quick scan tool has been released. Not that long ago I have reported that my concept on making SharePoint 2007 sites 100% Webrichtlijnen compliant did work. As soon as I have checked the same code using the newer version of the quick scan tool I have found there were still some errors present in the website.
Both server- and client-side events in ASP.NET are definitely something to take into consideration while developing Webrichtlijnen compliant websites. As Internet facing websites based on SharePoint 2007 are most of the times highly customized you as developer are in control of the output and the way you implement your business logic into the custom control. It is doable but it requires some more creativity than a regular SharePoint solution.