php5-interbase + ibwebadmin 1.0.2 added to the ubuntu gutsy repository
php5-interbase package fixes php-api dependencies (LP: #179803) and (LP: #135695)
and ibwebadmin is an update release for ubuntu gutsy
the repository can be used by adding it in /etc/apt/sources.list
deb http://ppa.launchpad.net/mapopa/ubuntu gutsy main
deb-src http://ppa.launchpad.net/mapopa/ubuntu gutsy main
then
$sudo apt-get update
$sudo apt-get install ibwebadmin
as bonus firebird2.0-super from repository fixes startup bug when server is restarted