This release will stop block production on October 13th at 9AM EST and adds new API calls for exporting the wallet for Graphene.
If delegates do not wish to stop producing blocks at the stated date/time then they need not upgrade. If you are a seed node then you do not need to upgrade.
All delegates committed to transitioning from the existing BitShares network to BitShares 2.0 should upgrade their node(s) to 0.9.3, publish their version to the blockchain and be ready to produce 2.0 blocks using the Graphene codebase upon launch 13 OCT 2015.
Stakeholders should watch each delegate's published versions (both active and stand by) and their statements below, then adjust their votes to support delegates that (will) produce blocks for the network they intend to follow after the announced hard fork time. An updated list is visible at the bitsharesblocks website [1].
Stakeholders should take care to ensure their wallet client software and that of the third parties they may interface with also follow the chain of your choice after the hard fork. These choices are yours to evaluate and act upon. Decentralization welcomes you.
[1] http://bitsharesblocks.com/delegates