If you are located behind a proxy server (or using TOR services) and running Leopard in combination with .Mac syncing, you might experience frequent crashes of the PubSubAgent. Here are a few links which provide a fix - in short: adding *.mac.com to the 'bypass proxies' list in System preferences → Network → Proxies.

More details here:
http://discussions.apple.com/thread.jspa?messageID=6056954
http://www.mmisoftware.co.uk/weblog/?p=293

After a head crash wiped out my Powerbook's hard disk a week ago, I was forced to re-install all the Unix software I had installed. This includes Python (an updated version compared to the Apple shipped one), GMT, and PostgreSQL/PostGIS. I used the new Python2.4.3 Universal Binary distribution from MacPython.org and ran into trouble (library linking/gcc) when I wanted to install other python modules.

So far so good. It took me a while to find the solution for this: As a good citizen I had installed the new XCode 2.3 update from the ADC which is all set up for the universal binary Intelmania shebang but forgot to tick the "Mac OS X 10.4 Universal SDK" option when customizing my XCode install. Apparently Universal MacPython requires this SDK to be installed, as it instructs the linker and compiler to use this specific SDK. Case solved -- all modules compile fine after I installed the SDK. It might be a little bit more helpful to put a note on the MacPython website as people likely need to compile all sorts of different modules which are not yet available as nicely pre-compiled universal binary packages. Anyway - here's the link to the full blog entry: from __future__ import *.

Finally I managed to upgrade PostgreSQL and PostGIS on my two machines running Mac OS 10.4.5 (Dual G5 and G4 Powerbook 12'') over the last weeks and now I am running v8.1.2 and 1.1.1 with geos-2.2.1 and proj-4.4.9.
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Subversion is a revision control software like CVS. It allows you to keep track of changes you made to any project, either software projects, data projects or your thesis.

Good tutorial to set up svn on Mac OS X:
http://www.distracto.net
Subversion home page:
http://subversion.tigris.org
Pre-compiled binaries for Mac OS X on Martin Bott's homepage:
http://www.codingmonkeys.net/mbo