Currently running with Informix 4gl tools at version 7.20.UD4. The
development and QA systems are on AIX 4.3, but production (9 installs)
run on AIX 5.2 (IDS 7.31.UC5 btw).

Compilations have been taking place under AIX 4.3 and binaries moved
over to production, AIX 5.2, for almost 2 years without issue. Now
that finaly all production sites are on AIX 5.2, our dev and QA
systems are also moving to AIX 5.2 (whoopee). Once dev/QA/production
are all on AIX 5.2 I have the urge to recompile the application and
roll it out again. Do I really need to?