For now I have not found bug, but I have notice there aren't ingame description of the new spy mission, when you have to choose one. It could be difficult to choose without information of what they do exactly. And there is not in the civilopedia also, so I think it need a short description in the spy window, like other missions.
Are you playing the game in french or english? I only updated the pedia in english, I'm sorry (which is not even my natural language).
If in english, you can check the espionage buildings in the pedia or simply read the changelog. With a little experience, there should be no trouble.
Now, its true that there's no new text in the window when you choose a spy mission from the spy popup. That's because those texts, as far as I can tell (since I updated all the texts that I could in XML: not bad), are written inside the DLL and I'm not compiling a new DLL just for that.
So, there's actually a few mistakes in a couple of spy missions texts from the popup. For example, the Seduce Leaders mission is now changed to provoke -25% hammers, -25% culture, -50% GPP, -25% espionage defense in the targeted city, but the popup text is still the original.
That's how it goes. But, again, if you check the building pedia or the changelog (recomended), you'll understand correctly what is does.