The main difference between this version of Firebird and the present stable is its install location. It's no longer installed under /opt with symlinks to other places. It's now installed per FHS without symlinks. I have been running it for a while on my development server, and production ones. I haven't see any problems, but there still could be some. The problems I did experience I addressed already thus it being -r2. Mostly with looking for stuff in the wrong place. Still it should be tested a bit, and not to much advice there on how to test. If you have your own db's with UDFs or etc that would be ideal. I use some of the default UDF's which seem to load fine from the new location in /usr/firebird/UDF or etc. Same with stuff for character sets, and etc. Thanks
Stable on x86
amd64 stable, last arch closing bug