Hi,
I have seen a ticket that has been closed for the chat bar not working in the Android Browser. I am using "Branded" Arrowchat 1.5.11 and while the bar shows, the chat box will not open - this is using the Android Browser in Gingerbread. When using the andorid-emulator.org website, the chat bar opens the first time it is clicked, but not the second and subsequent times.
I have tested this using my own mobile phone and the Android Emulator available at android-emulator.org and using the arrowchat.com web site.