I have a problem with setting Browsing Path in Delphi 2009:
When I install a new component, I add DCU path to Delphi\'s Library Path, and source path to Delphi\'s Browsi
Are any of these units listed in the .dpr ? Units there with a wrong path can cause pretty funky behaviour.
Setting "Symbol Reference Info" to "Reference Info" does indeed fix the issue with Browsing Path.
But at least for Delphi XE the change has to be made in "Build Configuration -> Base" for it to work.
I would ensure the dcu's were compiled with debugging turned on. If this is a third party component and the source is provided with it this is usually the case but not always.
I was struggling with this problem for a long time. Changing REFERENCEINFO in package settings from "none" to "definitions only" did the trick. Hope this will help you also.