SQLDeveloper i18n problem while connecting/testing connection to oracle DB

Hello,
i've got a problem with connection to oracle server if there's a number (or some other strange character?) in SID/SERVICE NAME, after pressing "Test" button I get just Exception:
Status: Failure - Test Failed: oracle.i18n.text.converter.CharacterConverterOGS.getInstance(I)Loracle/sql/converter/CharacterConverters;
If I skip the test and save the settings, connection to database (expanding + in the list) will do nothing.
I'm using correct username/password/hostname/port, I've checked it many times.
I've tried to change database name from TEST9 (it's erroring on this one) to something else and server return exception about non existing database, so connection parameters are ok I think.
I'm using fedora 8 with JDK1.6 and latest SQL Developer package.
Thanks for any help.

I would file an oracle jdbc bug to begin with, but I am guessing the driver is simply waiting
for the DBMS to respond, so yo may need a good DBA to see what the DBMS thinks is going
on at the time. I did hear of a case where the DBMS was doing some auditing, logging
some info during every login. This info was being written to an OS file which just happened
to be remote-mounted and would occasionally take 30 seconds, which caused connection
requests to timeout at the driver end.... WebLogic is just asking the driver for a connection
using your properties, so it's not involved directly with the problem....

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