Analysts see First Solar's (FSLR) 45% run-up yesterday following upside guidance as overdone. "Efficiency roadmap promising but the history makes us cautious," CSFB says. It's "the best house in a bad neighborhood," Jefferies says, maintaining its $30 price target. Pacific Crest is "highly skeptical of the target model." No upgrades, tame target raises. Shares -6% premarket.