Before Lion, when entering a new event, I would click on the relevant date, and then any new event would be created at that date.
Now, it's always created today. -If I don't type the date, that is. -Or day of the week. Which could be a cool feature, if it wasn't the ONLY way. -AND if days of week supported my local language, Danish, in stead of requiring english (or spanish og french or german, it seems).