su problem after bad meld install

[Jenn Mixxmann]

Hello,
  
   I tried using macports to install meld (a visual diff tool).   The install failed due to some dependency.   This turned out to be okay since I ended up using a different tool than meld.   However it left my root account in a bit of a quandry.   I ran
port install meld
directly from the root account since I was taking care of some other tasks also.   After the install failed, I exited from the account back to a normal account and did some other work.    When I needed to su back, I noted:
1) the default shell for root had changed from bash to sh
2) every time I ran 'su', Little Snitch would pop up saying that su was trying to contact my DNS server on port 53.   (I can allow or deny the request; it doesn't matter since su will still work correctly.)

   I changed the default shell back to bash, however I'm not sure of what to do to fix the second problem or why su needs to contact the DNS server.   Is there a quick fix for this?

thanks.

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