"Forbidden
You don't have permission to access / on this server."
I gave up and made my own image with a simple startup script running the new version of CPUminer with autotune.
It now has a text user interface and API json stats output, you should consider using this in the hashra image since autotune is a lovely feature.
(If anyone is interested in my image PM me. It requires configuration by manually editing the startup script to match your setup and pools but, it seems solid and autotunes per-chip.)
I think the new image in some way puts stress on somewhat faulty sd cards that work with other stuff, since I have changed card it's been fine
Curious. All the cards I tried have been similarly generic el-cheapo cards that worked with minepeon. I'll throw a sandisk at it and see if that helps.