On the demo5.0 server, when performing the following steps:
1. Open the Income statement report (under Accounting / Reporting menú)
2. Double click on the Revenue account (under the Income account).
3. On the list of accounts double click on the Main Revenue to open it's Lines.
- No Line is shown
- A list of move lines of this account are shown.
The fun fact is that if you open the General Ledger (which is the same view as step 3), double clicking on the Main Revenue show it's lines.