Sunddenly cound't submit single-line message today..

[GoogleCodeExporter]

What steps will reproduce the problem?

I use this app almost every day (it's really good app, thx u discovered this 
app btw), 
mainly use (Chinese Charaters) in whatsaap to communicate stuff in work.
I upgraded my phone to Androaid 4.2.2 on this weekend.
I rememered when I test (briefly) after upgraded,
just press enter to send out message on whatsapp is OK.

But today when I press enter to send out a whatsapp message at work as usual,
the progamme automatically change to multi-line messages,
I have to press Ctrl+enter to send out..

The issue occurred because my phone is on new version of androaid or did I 
press some key wrongly??

Pls kindly advise how to change it back to single-line messages.


What version of the product are you using? On what operating system?

Sony Xperia Z, Android 4.2.2

best regards,
Jayee

Original issue reported on code.google.com by jayee0...@gmail.com on 8 Jul 2013 at 2:40