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Indeed this is a common topic about an all too common problem with our AISIN manual transmissions. The first to second gear shift can be problematic until the transmission has warmed up, and even then it's not perfect, in my mind. I've driven a variety of manual gear boxes (Jaguar, Audi, MG) and have never experienced anything like the problem we're experiencing with the FRS/BRZ.
I think the biggest improvement in shifting results from using a lower viscosity oil. Pentosin 75W 80 seems to make HUGE improvement in cold shifting. Notably, the shop manual specifies 75W 85 or 75W 90 oil, so beware that 80 weight oil is not recommended by Subaru.
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