First of all, English is not my mother tongue, I think there are some(or many) wrong expressions.

I installed Ubuntu 7.04 at last weekend, and I faced a problem.

The Applications I built with Qt4 look very "ugly".

Please see this image.


It's assistant application built when Qt4 libraries was built, and all characters in the application look "dirty".

The characters of all applications built with Qt including not only what I made but also ones built when Qt4 libs was built look same.

Does anybody what's wrong with my applications?

The version of Qt is 4.3.0 open source edition for x11, and the OS is Ubuntu 7.04.