AmigaOS 4.1 Update 1 running just fine on my MicroA1-C now after I disabled the rear USB ports.
OWB 3.23 working fine here. I have not had a chance to try out my other software yet.
For whatever reason, Update 1 is very unstable on the MicroA1-C machines. Problems booting from CD or hard drive make it very difficult to install the new OS. Most users experienced booting problems, for example Grim Reapers or booting into a blank white Workbench screen or booting into a black screen or freezes and general unstable running if it booted all the way into OS4.
Temporary fix is to disable rear USB ports using UBoot. This makes the system stable.
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redfox