I found two bugs in 0.51 tied to Dolores' storyline. In both cases, the root cause is having women in your platinum room before finishing her mini-quest once she has arrived in your gold room.
1) If you send Mia and Claudia to the platinum room before reaching the point where Maria suggests that you speak to a model, Claudia will re-appear in her apartment. You can click on her to speak with her (and Mia has dialogue but is otherwise invisible). She does send you to the next part of the quest (to speak with her mother). However, if you choose any of the options which relate to having sex, after the sex is done, the game returns to the platinum room. Since Willy isn't there, he can't move and you're stuck.
2) If you send Monique to the platinum room before Claudia sends you to her, then she isn't at her house (correctly), but there's no option to talk to her about the topic in the platinum room.
I also haven't been able to figure out why I can't get Skye to the platinum room, even though Savannah is in the gold room, but that may just be some missing trophy or something along those lines.