fgets failure in Solaris after patching

Rebuilt the PostgreSQL server software because we were patching up from 9.0.4 to 9.0.8. Deployed software and received the following error when trying to restart server.

fgets failure: Error 0
The program postgres is needed by pg_ctl but was not found in the same directory as pg_ctl

9.0.4 works. 9.0.8 does not.

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