Although the pro/ con discussion has been beaten to death in numerous forums, I feel obliged to urge my fellow Leicaists:
1. Use filters, use filters, use filters!
2. Better still: close hip bag properly
40 years of accident free photography passed by in an instant...
M7 & Cron 50 V with Leica UV filter after full drop on asphalt. Body and lens elements seem to be miraculously undamaged (besides minor mark on retractable hood). Focusing is butter smooth and aperture clicks softly (lens and camera visited Wetzlar half a year ago for a full CLA). I still have to find a way to remove the filter, though, which seems cold-welded to the lens thread...
Kind regards
Mathias