I came across this through my G+ feed:
http://ekaia.org/blog/2012/05/20/long-due-to-do-item-removal-of-qt3-from-debian/

I do not think this will affect Trinity much with its own (T)Qt3
packages, but it still seems relevant. I can imagine it may make it
slightly harder to get Trinity into Debian in the future.

Best regards,
Julius