scrollbars strange behavior

[siniy]

sinelnikov@designer02:~/coding/bezzubov$ dpkg -l|grep libqt4
ii  libqt4-core                      4.2.1-2 
ii  libqt4-dev                       4.2.1-2 
ii  libqt4-gui                       4.2.1-2

sinelnikov@designer02:~/coding/bezzubov$ dpkg -l|grep libqt4
ii  libqt4-core                      4.2.1-2 
ii  libqt4-dev                       4.2.1-2 
ii  libqt4-gui                       4.2.1-2

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Debian Etch at work. Ok, I'll try to compile my app with qt-4.2.2 for Windows.