BryonD said:
None that in any way reduce compatibility.
Suggested by who? Who says that the PF wealth expectations must be the same as the D&D expectations?
Nope. They would be facing 9th level PF challenges.
Nope. They would receive the gp and magic rewards for 9th level PF characters.
The problems you are talking about do not even exist because we are not talking about D&D characters. But even if they did they would simply change the balance, which would have zero impact on compatibility.
I think you've lost track of the discussion you were participating in a little bit.

I was responding to your comment in post 175 which was responding to Kinem's post 173 in which he said
Sure it would. Old module says 10th level PCs? Send in 9th level PF PCs. Give XP, level advancement as per ECL 10 PCs.
We're talking about an old 3.5 module for level 10 adventurers using 9th level PF characters.
The old module assumes they have level 10 wealth out of the 3.5 DMG. It is possible PF will bump up expected wealth a level compared to 3.5 but we don't know that yet.
They are facing D&D adversaries designed for level 10 D&D players. There may be conversion mechanics adjusting how CR and party level interact in PF so that the same encounters for a 10th level D&D party will result in the same proportion of advancement of a 9th level PF party, but that is highly speculative at this point.
They would receive the gp and magic rewards suggested for a 9th level PF party only if PF bumps up the expected gp and magic rewards by a level.
I agree with your point that if
everything is set to the new increased power balance point then you can skip LA effects on xp and wealth and have everything be balanced.
I'm not arguing with your technical distinction between compatible and balanced.
I am saying that using older materials will have mechanical implications because of the different power baselines.
As written now, assuming the PF characters are taking on 3.5 modules designed for 3.5 characters one level higher and using 3.5 rules that PF has not changed, they will gain more xp from those challenges than the higher level 3.5 characters get, need less xp to advance levels, and the same loot as the higher level 3.5 characters.
Until we see the PF changes, if any, on wealth and xp then saying the 10th level 3.5 module will give 9th level PF characters the same challenges, advancement, and loot as a 9th level standard PF module is speculative at best.