From the Object Browser, e.g., look for some class members in the third pane. Double-click on them, or select Open. The source file they are contained in always seems to appear, but actually scrolli
ng the Editor and setting the cursor to the beginning of the member declaration only seems to work 1/4 of the time, with no apparent pattern. Once the source window is open, it always seems to work th
ough it may take a couple of seconds.

Perhaps there is a race condition--i.e. if Editor does not open until after the request to set the line is called??