REALLY fruity starter

Hi, all.

I'm working with a starter that is about a year old. In the past, it always smelled very pleasantly yeasty. Recently, I've been baking less often and sometimes let a day lapse without feeding it. It has developed a VERY fruity smell that I find unpleasant. I'm back on a 24 hour feeding schedule now and have been discarding the majority with each feeding to try to be sure it is as healthy as possible. But, it still has that smell. 

Thoughts or ideas? My spouse doesn't smell a difference, but then he isn't really working with the starter as much.

It's an unbleached AP + rye starter.