BUG #8683: pg_upgrade

The following bug has been logged on the website:

Bug reference:      8683
Logged by:          gertw
Email address:      gert.wieberdink@ziggo.nl
PostgreSQL version: 9.3.2
Operating system:   CentOS 6.4 x86_64
Description:

pg_upgrade from 9.2.6 to 9.3.2 does not work. Error msg is: ERROR:  could
not access file "$libdir/postgis-2.0": No such file or directory.


No matter whether I remove all postgis2_92 stuff or ADD postgis2_93 stuff.
Error remains and I cannot upgrade. Please advise.


Kind regards,
-gertw