Hi there!
I found a corrupt tile near Budapest at Zoom level 13:
http://a.tile.openstreetmap.org/13/4533/2864.png
https://www.openstreetmap.org/#map=13/47.4918/19.2244
The bottom-third of the tile is missing.
Sorry I write here, but the bug reporting webform is buggy, doesn’t work, this one:
https://trac.openstreetmap.org/newticket#ticket
Always says: Warning: The action “None” is not available.