QToolTip Fails to Resize Vertically in some cases when rich text is used

It is possible to get the QToolTip to show without resizing properly vertically.
This problem on happens with rich text, and it requires some trial and error to get the tooltip to show in this state.

The tool tip is normally shown on multiple lines, when moving the mouse cursor back and forth between two buttons with tool tip
it is possible to get the multiline richtext tooltip to show up on one long line.

Reproducible in Qt 4.4 by modifying the examples/widgets/tooltips example in sortingbox.cpp and replace the following function with:
QToolButton *SortingBox::createToolButton(const QString &toolTip,
const QIcon &icon, const char
*member)
{
QToolButton *button = new QToolButton(this);
static int a=0;
if (a == 0)

{ button->setToolTip( "<p>Enter a time to jump to. Relative times begin " "with a <b>+</b> or <b>-</b> followed by an offset " "value. By default, offset values are in seconds; " "append <b>m</b> or <b>h</b> to indicate minutes " "or hours. For absolute times, enter the time in " "<b>HH:MM:SS</b> format.</p>" ); }

else

{ button->setToolTip(toolTip); }

a++;

// button->setToolTip(toolTip);
button->setIcon(icon);
button->setIconSize(QSize(32, 32));
connect(button, SIGNAL(clicked()), this, member);

return button;
}