More with the 150mm. 

While busily clone-stamping out little dust specks, I started to notice that my bokeh are... star shaped. Cue sinking feeling. That's not supposed to happen. 

I've since brought the lens back to be CLA'd again. I feel a bit bad making them do it again (thankfully they have a good service warranty), especially since the effect is quite pretty. I'm worried it will get worse and the shutter will be damaged, though.