The following is the summary of a couple of cases I worked on a while ago, there are some details which I’ll need to investigate thoroughly… anyway those are the facts so far. PROBLEM DESCRIPTION===================I have a rich WinForms UserControl which is embedded into a web page. Since installing .NET 2.0 on the clients, the control stopped loading completely. – I disabled security completely using caspol -s off => no effect – I enabled fusion logging => no single entry generated – I enabled the IEHost log => nothing created – Changed to another client machine => same issues, same results – I started writing a new UserControl from scratch and deployed it to the same server. The control could also not be loaded. I deployed the same test project to another 2003 server in the same domain, with equal patch levels (SP1 and latest patches installed) and it worked. Perhaps a naming issue? – I tried to change the names => no result – I compared the HTTP requests to the different server => nothing special – The issues stated above are reproducible from any client, such it should be a server or framework issue. – I even have…