As a taco on to Oliver's note, don't use a & in the room name of the Fusion room symbol. It makes the Fusion Symbol discovery process choke and die. Basically, avoid '&' anywhere it might possibly be put into an XML file, since Crestron apparently doesn't escape them correctly in any situation.
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A bit OT, but in a similar vein, when creating custom themes, DO NOT use '&' in the theme file name.
VTPro will do some very odd things like not show?the first instance of a?subpage...
It's an issue with VTPro, rather than the theme, and this is true for themes created in Studio as well as, err, other theme editing software products.
