Nexus 7 ignores apple-touch-icon
It looks like Google is afraid of being sued by Apple for using "square icon with rounded corners". There is an issu on http://code.google.com/p/chromium/issues/detail?id=125076. However there is information about fix version set to 25th release. I don't know if chromium and chrome versions have the same numbers, but last time I checked Chrome it was on v. 22. There is also a posted suggestion of introducing chrome specific Android-Icon.