Hi James,
I have the same problem as Jess above but on my iPad. Chrome on my iPad redirects to the full desktop theme but safari on my iPad redirects correctly to the tablet theme.
FYI, chrome on my android phone (samsung galaxy nexus) redirects correctly to the mobile theme.
The user agent for Chrome on the iPad that doesn’t work is below:
Mozilla/5.0 (iPad; CPU OS 6_0 like Mac OS X) AppleWebKit/536.26 (KHTML, like Gecko) Version/6.0 Mobile/10A403 Safari/8536.25
Any ideas?