Hi Andrea,
thanks for the follow up. I can confirm that prior to the ant fresh_install:
- did a clean package prior to the build
- dropped my database with ant clean_database 

However, I did start from a 3.2 deployment, so it's possible that I have the older lucene indexes still in there. Is there something else you can recommend as "cleanup" before running the ant fresh_install?

I only seem to have Lucene 4.4.0 Jars in my lib dir. here's the full contents:
http://pastebin.com/PKVfuPPn