Today, I had quite an ordeal installing OS 4.1 Update 1 on my MicroA1-C. Apparently, I was not the only one who kept getting Grim Reapers, or booting into a white Workbench screen with no icons, or booting into a black screen, or booting into a system that was unstable.
Eventually a temporary fix was found .... disable the rear USB ports.
My system has been stable since and no further bootup problems.
I agree with Matt_H about the icons. My prefernce would be smaller icons, but the larger icons have been present in OWB for some time now.
Since it took so long to sort out the stability issues, I have not played much with anything other than OWB.
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redfox