When I export the call-graph in the widget in the bottom right as DOT file it cuts the identifiers in the DOT file like: F55d95fbb1248 [label="operator delete(void*, unsigne...\n150 140 433"]; I don't want/expect this behavior.
As symbol lengths can vary a lot (up to 1000s of characters), this cut-off behaviour seems the most sensible to me. It should be easy for you to find the point in the source where you can tune the number of characters, or remove this cut-off functionality at all. The "real" fix would be to open a dialog with export options, but that is really low priority for now. Of course, I am happy to merge patches.