The new version of GXT didn't work with the Chrome OS, because the user.agent.os property isn't recognized and the application didn't load at all.
The chrome User Agent didn't contains the linux string.
This is an exemple of the chrome OS User Agent :
That's the inconvenience of browser detection vs. feature discovery. An unfortunate choice of Google, closing the door to minor browsers. I suppose feature discovery is harder to do, or more cumbersome, in GWT...
To further clarify, buying a commercial GXT license *without* support means you are allowed to use it subject to the terms of the commercial license, and doesn't mean anything about support. Buying support grants you access to our support-only bugfix releases, to SVN, to nightly builds, and gains you the ability to file support tickets and post in the premium help forums.