It was just brought to my attention that Google Earth Plus for Linux does not have any support for GPS devices whatsoever, despite this being one of its main selling points over the free version. Google advertises the four variants of its Google Earth product range (Free, Plus, Pro and EC) without making any differentiating remarks for the Linux, Mac OS X or Windows ports. There is no mention of this either on the GE product page or its help centre. A potential customer would almost certainly expect this feature to be present in all three versions of the software and as such misled by the product presentation by Google.