I am experiencing the same problem with Debian Unstable. The following thread seems to discuss this problem: http://www.mail-archive.com/[EMAIL PROTECTED]/msg14117.html
Some of my installed packages are the following (all standard debian packages): ii libagg-dev 2.5+dfsg1-1 The AntiGrain Geometry graphical toolkit (development files) ii python-mapscript 5.0.2-2+b1 Python library for MapServer ii libgdal1-1.5.0 1.5.1-4 Geospatial Data Abstraction Library ii libgdal1-dev 1.5.1-4 Geospatial Data Abstraction Library - Development files ii libgdal1-1.5.0-grass 1.5.1-1 GRASS extension for the Geospatial Data Abstraction Library ii libgdal1-1.4.0-grass 1.4.4-1+b1 GRASS extension for the Geospatial Data Abstraction Library ii libgeos-3.0.0 3.0.0-5 Geometry engine for Geographic Information Systems - C++ Library ii libgeos-c1 3.0.0-5 Geometry engine for Geographic Information Systems - C Library ii proj 4.6.0-1 Cartographic projection filter and library Cheers, Dolf.