Tiger compatibility may only be there for 10.3.9 and Tiger

Here is a quote I found on VersionTracker for a program called "Jotz". 
Read this quote:

"In order to work on the Tiger compatibility problem, I had to install 
the Tiger development tools. Apple set the default compiler in the tools 
to the new GCC 4.0, which looks like a fine compiler with many nice 
features.... EXCEPT, for the little gotcha that it only builds 
applications compatible with 10.3.9 and Tiger. This little zinger is 
documented, but only in the "fine print" of the "About" document 
accompanying the tools release, which normally has nothing of interest 
in it. The gotcha is not noted in the release notes, where it certainly 
belongs. Ouch."

The quote is found here: 
http://www.versiontracker.com/dyn/moreinfo/macosx/16185

I suspect this will make it difficult for Mozilla to support as many 
versions of OS X as it has in the past. Those on 10.3.x can always 
update to 10.3.9 for free. What about the users still on 10.2.x? Will 
Mozilla solve this issue by dropping support for 10.2.x? Will there be 
separate versions compiled for OS X versions earlier than 10.3.9 and 
another version for 10.3.9 and Tiger?