The old version was by MacSoft. The version on the CD was typically 1.14. It was patchable up to version 1.21g with downloads from MacSoft, and there's a "beta" patch to version 1.29b2, which was the best version of that software.
MacSoft lost the franchise for Civ ports to Aspyr last year. Aspyr produced Civ3 Complete at the turn of the year, which gives you version 1.22 of Conquests plus version 1.27f of Play the World. PtW is unsupported, but works fine.
If you bought a retail copy of Civ3 recently then chances are it was Aspyr's Civ3 Complete. If you bought it before 2006 then it was the MacSoft version.
The reason this is critical is that in Conquests you can produce Scientific Great Leaders that cannot make armies, or Military Great Leaders that can. In the earlier versions you could just produce Great Leaders, and they can always make armies.
If you want to upload a copy of a save that has a Great Leader who can't make an army, it'll be easier to see what the problem is.