I try to compile and i have this:

make[1]: *** [release/aboutqet.o] Erreur 1
In file included from sources/bordertitleblock.cpp:23:0:
sources/qetapp.h:240:41: erreur: expected class-name before ‘{’ token
 class QETStyle : public QPlastiqueStyle {
                                         ^
sources/qetapp.h:245:24: erreur: ‘StyleHint’ has not been declared
  virtual int styleHint(StyleHint hint, const QStyleOption * = 0, const QWidget * = 0, QStyleHintReturn * = 0) const;
                        ^
sources/qetapp.h:248:43: erreur: ‘StandardPixmap’ has not been declared
  virtual QIcon standardIconImplementation(StandardPixmap, const QStyleOption * = 0, const QWidget * = 0) const;
                                           ^
sources/bordertitleblock.cpp: In member function ‘QString BorderTitleBlock::incrementLetters(const QString&)’:
sources/bordertitleblock.cpp:607:28: erreur: ‘class QChar’ has no member named ‘toAscii’
    last_digit = last_digit.toAscii() + 1;