Barbara, for what it's worth: Grace-Smith's "Linda's Magic" to-date for two years (growing seasons 2012-2013) has had the same problem in my garden. Otherwise, it's healthy & extremely vigorous, and proved to be also rust-resistant when I unfortunately inadvertently introduced the rust scourge from a newly-bought US SE cultivar into my garden in 2009. This year I made sure that "Linda's Magic" was shaded from the worst of the afternoon sun, and I did get a few pods. But, the seemingly 'sun-burnt/-bleached' foliage continues, despite protection.
Last year, others on ATP also reported precisely the same problem, but ascribed it to unusual 'solar activity.'
Good luck! : ) For my part, I'm just happy that "Linda's Magic" is pod-fertile.
All the best - Elizabete
