WTableView header problem

Hi,

It seems WTableView can not display column name set with
WString::tr("some").

if you wrote

QueryModel->addColumn("project_id",WString::tr("projectid"));

It displayed a blank header column.

if you wrote

QueryModel->addColumn("project_id","projectid");

The header column got displayed correctly.

I was using Wt3.2.1 and IE8, Firefox 13.0.

------------------------------------------------------------------------------
Live Security Virtual Conference
Exclusive live event will cover all the ways today's security and 
threat landscape has changed and how IT managers can respond. Discussions 
will include endpoint security, mobile security and the latest in malware 
threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/