Well, that was interesting... Okay, one maybe-bug, one odd bug, and one balance comment.
Firstly, if you capture enemy workers, they look like Lizardmen and get the Lizardkin promotion. However, they cannot build trails, only roads (a fact that makes captured workers of limited use, and since they look like normal workers, it's hard to keep them apart.
Secondly, this one is really bothering me, although it might not matter to you: I was trying to rebalance the Lizardman promotion (don't really like it's current form, more on that in a bit) and I added back a little Jungle attack/defense for them. I'm getting an interesting crash however. I got the Spider Mine event on one of my mines, and sent a Hunter to go collect the Spider. However, the moment the Hunter moves into visible range of the Spider, the game crashes. However, the game ~only~ crashes if the +15% Jungle Attack is added to the Lizardkin promotion; taking that out removes the crash. Not sure this is relavent (unless you adopt my proposed balance changes), but it is a very odd crash.
Lastly, the balance bit: I still think the Lizardkin promotion is a bit overpowered, mainly if you compare it not only to the other racial promotions, but to the Defender trait (admittedly, Defender is underpowered, but not by that much). Effectively, Lizardkin generally gives you +25% in your borders, especially with how Jungle spreads. At the same time, being a Lizardman civ effectively nullifies the effect of the Woodsman promotion in your borders, which is one of the best promotions for raiding other civs. On top of that, they get four very useful abilities: Able to attack across rivers (really the only use of Amphibious), resistant to magic (not hugely powerful, but useful, especially when fighting summons), double jungle movement (Gives a huge, HUGE advantage when scouting; the jungles are the last place to be explored by everyone but you), and able to move through fires (Of course, Lizardmen get RAPED by fires as they lose all their Jungle, but the fact that the fire doesn't hinder your movement gives an advantage when the demons show up and helps you rebuild (you can even use the trick to get forested improvements)).
Overall, I feel the promotion needs a little toning down. At the same time, they could stand to gain back their regular Jungle attack, although I could see them just being left as a heavily defensive-focused civ.