This post will be a listing of known/reported bugs and their status.
Current version (v6.0)

when the advisor pops up and asks for to start the script, i clicked the advisor and then the "show me how" button type deal that kills the current faction leaders.
-this is not a bug, this was done to create a more or less proper family tree.

The small Sea to the East of Jerusalem looks funky and glitchy (that just maybe my computer but ive never had problems with it before)

Napoca is not on the east side of the carpathians mountains...it's on the west side in northen Transilvania...The other city "Colonia Dacia"(the name is actually "Colonia Ulpia Traiana Augusta Dacica Sarmizegetusa" but we could go with the one u gave too as the city isnt relevant for this time period,it was abandoned long ago) a little bit futher east in the mountain pass.
-noted, but as of the moment am not very concerned w/ map visual bugs.

...I started a campaign with the Constantini, and it was going pretty well but I ran into a pretty serious bug with their tech tree. Unless I'm missing a crucial patch or something, Constantine's boys can't build barracks structures beyond the 'Auxilia Barracks' .. This is a pretty crucial problem because it totally takes out the needed heavy infantry to carry on the fight against Rome.
this was done on purpose, u need to capture a settlement w/ high level training barracks to be able to train better units - part of the challenge.

Sarmatian Horde Argaragantes has no horse texture,
this is one problem that is still vexing me. they DO have a texture in DMB and aslo default texture. but in my personal experience I played hun army1 vs ERE army2, sarmatians have texture; I played ERE army2 vs exactly same hun army1 and !!!! NO TEXTURE ?!

They are not recruitable ...... why????
-Comitatenses Armatus - they are recruitable only in Asia Minor (modern day turkey), Palestine, Armenia. starting from version 6.06 they won't bre recruitable in Asia Minor, too.
-Elephants - Sassanids used mercenary elephants exclusively and did not actually train/raise their own, the elephants are available as mercenaries in the east. there is still some contention whether to change this but as of now, until more compelling evidence is made available, they will remain unrecruitable.

CTD durring battle against Constantine Empire. I can autoresolve it just fine; but I can't fight it which takes the whole point away.
Caligula81 also found this fix, but I think somebody also did before.
change 16bit stratmap and battlemap resolution to 32bit

i can play custom battles but when i try to start up a campaign it ctd with out any error message.I re instalt it for 5 times and it still ctd.
probably one of the first few errors to have been reported and fixed.
Some video cards cannot handle the strat map models. DL the optional 'revert to CA' file in the downloads section and install. included is a 'revert back to IBFD6' file w/c will revert back to IBFD models.

thanks for the bug reports.
Please report the bugs in the discussion thread