VMware has released an update for ESXi 5.1 (ESXI510-201210001) that addresses two issues related to PowerPath/VE 5.7 and an issue with the View Storage Accelerator and View 5.1. The issues that are resolved with the update have been highlighted on VMware’s website since they were identified.

Knowledge Base article KB:2034548 has the details for the update.

In addition to the online or offline patches, VMware has also provided an updated ESXi 5.1.0 ISO image available here.