Checked in betalabs and in the current production (wmf.15) using rcfilters=1 in a url.
- Go to the Watchlist with filters. Make sure that you have some seen changes displayed ('Mark all changes as seen' button should be inactive). Or just click on the button to make all changes seen.
- Click to select both 'Seen changes' and 'Unseen changes' filters (full coverage) - some records should be displayed.
- Deselect 'Unseen changes' - no changes will be displayed.
- Deselect 'Seen changes' - changes will be shown.