I rasterized the "Stripy background" group (right click on it in layer palette and select 'rasterize') and the image exported to a jpeg fine (notice the text is off, as I didn't have the font you used and it needed to be substituted).
I suspect this is a bug though, and perhaps has something to do with the fact that the "stripy background" layers are larger than (and not fully contained by) the artboard?
TDmah got a reaction from livetheshot in Can't group layers or select masks while recording Macro
TDmah got a reaction from misc33 in Gaussian blur and transparency missing on export