Another time that comes to mind was around the time of Sookie's wedding...other people have brought it up...he and Lorelai were going to get together, they had a nice night before the wedding, talked about getting together, she even told her parents that they were going to be together (I think)...then the day of the wedding he tells her Sherry is pregnant and is going to be there for Gigi (which is very commendable), but Rory wouldn't take/return his calls for a while after this (her choice, not Lorelai's)...he shows up (more like ambushes her) at Friday night dinner, demands Lorelai talk to him, then blames her for not allowing Rory to talk to him.
There has been a lot of good discussion about this, I don't really have any more to add to...although, I do want to say that I dislike Christopher and it has nothing to do with liking Luke more, in fact last season and even in season 5 Luke got on my nerves a lot with the breaking up, running away and what not. I don't care for Chris for many of the same reasons that lsufan has brought up, so I won't repeat what's already been said.
I've mentioned this before and I think someone else sort of brought it up, but I think my biggest issues with Chris, is that he is not a main character...a lot of stuff happens off screen with him and between him and Lorelai so we don't actually know how things went down...it's left up to the viewer to interpret it the way that they want, well want isn't the right word. Which can be good in some cases, but in the case of Christopher I'd rather know what has happened than have to infer what has happened.
Lorelai did tell her parents that she and Christopher were going to try a relationship. For me there’s so much good and bad wrapped into that situation it’s hard to separate it all. Rory did chose to stop taking his calls, that decision was made by herself, although it was a little fuzzy because at the end of Rory telling Lorelai that it was her own decision to stop talking to him she says “solidarity sister” and they high five. That scene really bugged me because it indicated that Rory was freezing him out just because Lorelai was. We saw Rory tell him it was her own decision later in Haunted Leg. And I’ll agree that he did disappoint Rory there by leading her to think the dream every child of a single parent has, of their parents getting back together, was coming true. I guess it’s seeing him admit his mistakes and trying to make up for them (sporadic as it was prior to this season) that allows me to not hold it against him at every turn. I have a soft spot for people that can admit when they’re wrong, it’s an admirable trait for me.
It does bug me that they refer to events that occurred off screen, always has. But for the most part they do a decent job of filling in the blanks as far as what those events mean to the main characters, just not the supporting characters like him.
Actually, there was a great deal of heated debate about Logan and Rory last episode, so now it's Lorelai's turn. A lot of people (myself included) assumed Logan couldn't possibly be jealous at this late stage and quested pages for other reasons he would have been angry.
Maybe we're making this more complicated than it has to be: Chris pressed her to marry him because he was sure she loved him absolutely. She accepted because she's burned out on calling the steps in her relationship. Chris was understandably disappointed when he found out her feelings were not clear-cut, so he had a fit and went "out" to think.
Or maybe I'm just out of steam. Good thing there's a new episode tonight!
You might be right on track with this
lessa 
ETA:
lsufan I re-watched this episode (and part of SSS) the other night and forgot to mention I noticed the bangs!

She definitely had them in SSS, but in this episode they're gone. I paid close attention because of you mentioning that (I know, sometimes I have too much time on my hands, I even rewound a couple scenes to double check - thank goodness for the wonders of technology giving me my DVR) and they're definitely gone but it looks like she just had them pinned back with a barrette or something under her hair.