[Pandora]

Kyobanim may be right on the Java theory for this forum.

Additionally, it could be active x, vb or browser security setting errors. If your security setting is set to 'high' this will often result in the yellow caution, (which may give you more specific information if you click on it).

A couple of things to check if you are on IE 6:
IE | Tools | Options | Security | Internet | click custom level ... flag the follwoing settings "on"
Active X Controls - enable
Initialize Active X scripts - enable
Run Active X - enable
Microsoft VM | Java - medium safety
Misc | Access data across domains - Prompt
Allow meta refresh - enable
Display mixed content - prompt
Active Scripting - enable
Scripting Java - enable

That is a start. After changing settings, clear history (can keep cookies), close all browser windows, then test results in a new browser window.

There can also be other triggers to cause the errors, i.e. certain pop-up blocker settings.