I have a set of .pdb files which are correctly source-indexed, and VS successfully steps in to the downloaded source.
However, if I right-click on a class/method/etc that is defined in the relevant library, and select Navigate To->Sources from symbol files, R# fails to open the source file and the following message is logged:
PdbNavigator: Searching for 'Db.Montage.Common.ClientInitialisedWaitHandle' type sources in C:\Projects\SymbolTest\Db.Montage.Common.pdb
PdbNavigator: No sources found in debugging information for 'Db.Montage.Common.ClientInitialisedWaitHandle' in assembly '...'
As I say, the source is definitely there - it is in the VS symbol cache, and I can step into the code when running the application. Just can't navigate to it using R#.