I already posted one of the more interesting PODs: Victor Chernov becomes Minister of Foreign Relations instead of the Minister of Agriculture, leading to the weakening of the Provisional Government, an earlier revolt of the rightists, but also a Treaty of Brest-Litovsk in July 1917 rather than March 1918, which would give Russian control to Estonia, western Latvia, and the Ukraine.
How about another one:
- In Kharkov, there was extreme resentment against Kornilov for restoring the death penalty. The Left SRs there joined with the Bolsheviks and the left-wing Mensheviks to set up a "revolutionary staff" there that simply took over the military functions of the Provisional Government. A few of the Left SRs decided not to institute a full-fledged soviet regime. Had they decided to, the October Revolution could have began at the end of August in the Ukraine.
What are your other PODs that could have happened during the Russian Revolution. It was a crazy time, a time of a thousand choices that made a difference, where one extra voice or one less action could have changed everything. List them here.