hah...when I fix it correctly (thanks SixDegrees!) I get a crash, with the following output from the debugger:

Program received signal EXC_BAD_ACCESS, Could not access memory.
Reason: KERN_PROTECTION_FAILURE at address: 0x00000004
0x010ae229 in QLayout::setSizeConstraint ()

Hmmm...again

2010-05-19 04:18:58 +0300

EXC_BAD_ACCESS (0x0001)
KERN_PROTECTION_FAILURE (0x0002) at 0x00000004

Thread 0 Crashed:
0 QLayout::setSizeConstraint(QLayout::SizeConstraint ) + 9
1 SortDialog::SortDialog[in-charge](QWidget*) + 183 (sortdialog.cpp:11)
2 main + 74 (main.cpp:7)
3 _start + 216
4 start + 41

Now when I comment out that line and compile, the example builds, and runs, but imperfectly.

Well, better than nothing