I wasn't reading Robin but did Steph realize exactly how much she hurt him with all this "Year in Africa" stuff while he sincerely mourned her as dead and was all angry at Bruce. In the few times I've seen them together since (BfTC or RR) she just doesn't seem to get why/how he would be pissed at her. Even here it's "just like old times" in her mind. I know Miller has introduced a new "possible love interest" (really, that's how described the guy in an interview) for Steph in Batgirl but has there really been closure between her and Tim (especially now that she and Babs are now seemingly occupying Bruce's cave under Bruce's house for their HQ - something I don't think Bruce would EVER agree to and Tim is all about Bruce these days).