Starbucks still needs to solve a massive problem, as analysts worry about 'anemic' traffic (SBUX)

Starbucks' shares hit an all-time high on Thursday, with US comparable sales up 4% in the most recent quarter. 
Despite the sales growth, Starbucks' transactions were flat yet again. 
The coffee giant has struggled to grow transactions in recent years, instead relying on stores selling more expensive drinks and customers buying more items to boost sales. 
Visit Business Insider's homepage for more stories.Starbucks' shares hit an all-time high after reporting quarterly earnin