Error "cannot compare arrays of different element types" when trying to ANALYZE

Hi

Since sometime yesterday, my postgresql (7.4.5) reports
"ERROR:  cannot compare arrays of different element types",
when I analyze a specific table in my database.

Here is the tables definition:
       Column       |          Type          |                     Modifiers
-------------------+------------------------+----------------------------------------------------
  self              | datagraph."GOLink"     | not null default
nextval('datagraph.s_self'::text)
  Bezeichnung       | datagraph."Char"       |
  virtual           | datagraph."Boolean"    | default true
  Mitarbeiter       | datagraph."GOLinkList" |
  Abteilungen       | datagraph."GOLinkList" |
  Memo              | datagraph."Text"       |
  Leiter            | datagraph."GOLink"     |
  PostfachLand      | datagraph."GOLink"     |
  PostfachOrt       | datagraph."Char"       |
  PostfachPLZ       | datagraph."Char"       |
  PostfachPostfach  | datagraph."Char"       |
  PLZ               | datagraph."Char"       |
  Ort               | datagraph."Char"       |
  Land              | datagraph."GOLink"     |
  Strasse           | datagraph."Char"       |
  Telefon           | datagraph."GOLinkList" |
  Telefax           | datagraph."GOLinkList" |
  eMail             | datagraph."GOLinkList" |
  BS Nummer         | datagraph."Char"       |
  Aktiv             | datagraph."Boolean"    |
  Eroeffnung        | datagraph."Date"       |
  Schliessung       | datagraph."Date"       |
  Eintritt          | datagraph."Date"       |
  Austritt          | datagraph."Date"       |
  TUI Agenturnummer | datagraph."Char"       |
  Bankverbindungen  | datagraph."GOLinkList" |
  Marke             | datagraph."GOLink"     |
  Buchhaltungsinfo  | datagraph."GOLink"     |
  Name              | datagraph."Char"       |
  Oeffnungszeiten   | datagraph."Text"       |
  Zusatz            | datagraph."Char"       |
  HR Firma          | datagraph."GOLink"     |
  www               | datagraph."GOLinkList" |
  Vertraege         | datagraph."GOLinkList" |
  Standortinfo      | datagraph."GOLink"     |
  Marketinginfo     | datagraph."GOLink"     |
  OnChange          | datagraph."GOLinkList" |
  Historie          | datagraph."GOLinkList" |

The datatypes are all domains with the basetype being what the name
suggest (e.g. datagraph."Date" is a domain with basetype date).
GOLink has the basetype int8, which GOLinkList has the basetype int8[].

Google just returns one(!) hit when searching for the error-message,
which points to the file generating the error
"/cvsroot/pgsql/src/backend/utils/adt/arrayfuncs.c".

greetings, Florian Pflug