PowerShare has not been tested and is not supported with System 7.5.3. In addition, there are known incompatibilities between PowerShare and Open Transport 1.1. Also, there are no benefits to be gained by running a PowerShare server with System 7.5.3.
Therefore Apple strongly recommends that you do not update a PowerShare server to System 7.5.3 with the System 7.5 Update 2.0.
This article was published in the Information Alley on 1 Apr 1996.