Problems with enums after pg_upgrade

Hello together,

last thursday I upgraded one of our 9.0.6 postgresql servers to 9.2.2
with pg_upgrade. So far everything seemed to work but we now discover
problems with the enum types. If we run one specific query it breaks all
time with such an error message:

ERROR: invalid internal value for enum: 520251

if this number should represent the enumtypid it is not existing anymore
in pg_enum.

How could i solve this problem? should we regenerate all enums? or what
could we do?
Hopefully anyone has a clue, google doesn't seem to be the ressource for
this problem.

thanks in advance
Bernhard Schrader

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Bernhard Schrader
System Administration

InnoGames GmbH
Harburger Schloßstraße 28 (Channel 4) - 21079 Hamburg - Germany
Tel +49 40 7889335-53
Fax +49 40 7889335-22

Managing Directors: Hendrik Klindworth, Eike Klindworth, Michael Zillmer
VAT-ID: DE264068907 Amtsgericht Hamburg, HRB 108973

http://www.innogames.com – bernhard.schrader@innogames.de