I still have some clients running WSS 2. As good IT guys, the IT team patched their WSS 2 farm with Service Pack 3.

Concurrently, I was putting together some dataview web parts to render some web services. Everything worked great on the development virtual server, but try as I might, I could not get the webparts to render for nayone other than administrators on the live servers.

Eventually, we tracked down the problem. SP3 has broken some of the dataview functionality, as noted by SporkBomb. It took a lot of head scratching and crawling the web to find this. (The development machines are were still at SP2  )

Microsoft has issued a hotfix to rectify this, but you will have to contact your support centre to obtain the fix. If the blogs are anything to go by, this could be a painful hotfix...