ult in inconsistent indexes in which some keys
      that are present would not be found by searches, and also in indexes
      that are unnecessarily inefficient to search.  Users are advised to
      <TT
CLASS="COMMAND"
>REINDEX</TT
> multi-column GiST indexes after installing this
      update.
     </P
></LI
><LI
><P
>      Fix infinite-loop risk in regular expression compilation (Tom Lane,
      Don Porter)
     </P
></LI
><LI
><P
>      Fix potential null-pointer dereference in regular expression comp