She was one of my favorite characters on the show but this left a real bad taste in my mouth:

Ira Steven Behr said:

We had planned to see Terry Farrell in the flashbacks but she refused to let us use any of her clips. The way I see it is this: Her manager was informed that we were thinking of using Terry in a scene in the final episode. It would have probably been three hours of work... maybe four. The price they quoted us was too high for the budget. After all, this was a show where we had to cut out hundreds of thousands of dollars from the original draft.

Her manager was informed that we weren't going to be able to use Terry. And on top of it, the scene we had been thinking of for her was really not that germane to the plot. I think Terry's feelings were hurt. When it came to the issue of the clips, they again felt that they would prefer that we went a different way without using the character of Jadzia Dax. So we did. I wasn't happy about it. I'm still not happy about it. But it is a reminder that even Star Trek is just part of the great showbiz sludge.