Ola, If you go into Administration->Setup->Database, then you will that under "How should we connect to the database?" you can choose TCP/IP or UNIX Sockets. I'm not sure why it does not appear in the source. I still think that it is an IMP specific problem, since Horde itself uses the UNIX socket to connect.
-Roberto -- Roberto C. Sanchez http://familiasanchez.net/~roberto
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