SX50 crashes: Subject Distance Override / Distance Bracketing / ND Filter Option

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Hi I would like to report three conditions that reproducibly lead to crashing of CHDK on my Canon SX50, Firmware 1C.

1. Setting Distance Override to any value (100 .. infinite) and setting the camera to manual focussing results in a crash after the shutter button is pressed. This is observed for CHDK versions 1.3.1, 1.4.1 and 1.5

2. Setting Distance Bracketing to any value and setting the camera to manual focussing results in a crash after the shutter is pressed and held. This is observed for CHDK versions 1.3.1, 1.4.1 and 1.5

3. Setting the the ND Filter Option to "In" now works since Firmware version 1.4.1. In 1.3.1 nothing happened despite the message that the ND Filter was in. However, when the shutter is half pressed, focussing only works correctly during the 1st attempt. If no photo is taken and the shutter is half-pressed again, the focussing light does not come on. If again no photo is taken and the shutter is half-pressed for a third time, the camera crashes, reproducibly.

Are there any updated CHDK distributions or alternative branches, etc. available that solve these issues ?

Thank you and best regards,
Klaas