At the very beginning of the quest to dismantle the revolving bridge, before leaving Babbage's workshop, talk to Sorensen (who has replaced Lyon as your "shadow"), and he'll say this:
Sorensen wrote:I wonder what Lady Sialeeds wanted with Gizel. Anyway, I hope they're done talking...
Once you've left Babbage's workshop and gotten Lu, he'll say this instead:
Sorensen wrote:We can access the revolving bridge through a door on the bridge support! We'll need a boat, please!
It's a minor mistake, but I thought it was kinda interesting.