There's got to be something lacking in the Aberdeen training and physios somewhere. To me, Smith's injuries are mirroring those of Scott Booth.
Scott was a fantastic player for us (I'm not going to talk about the 2nd time he played for us, as I'm more concerned about his exploits first time around). When he played, he was a real breath of fresh air and a genuine footballing brain that knew the route to goal. But he just couldn't stay away from the injury table. It seemed whenever someone sneezed in Montrose, the effects rippled their way up to Pittodrie and Scott would become injured.
When he moved away from Aberdeen, the Dortmund specialists quickly realised that he had one leg longer than the other, and designed special boots for him. Hey presto, he went on to play like a normal footballer should do for clubs like Dortmund, Twente, Uttrecht, etc. As soon as he came back to Aberdeen, though, he started making regular appearances on the injury table again.
It seems to me to be the same with Smith. I don't know his injury history pre-Aberdeen. But how can one man have such bad luck with injuries? Surely there's something wrong with the physios / training at Aberdeen. Surely!