In http://trac.webkit.org/changeset/56292 a change was made to use an extra default stylesheet which results in a compile failure on Maemo:
../../../WebCore/platform/qt/RenderThemeQt.cpp: In member function 'virtual WebCore::String WebCore::RenderThemeQt::extraDefaultStyleSheet()':
../../../WebCore/platform/qt/RenderThemeQt.cpp:187: error: 'themeQtNoListboxesUserAgentStyleSheet' was not declared in this scope
A full build solves this problem. :-)
Please look at bug 36607.
*** This bug has been marked as a duplicate of bug 36607 ***