This is *so* lame... Trolltech needs to fix this issue, this is way wrong... anyway, this is what I am using right now (not very pleased with it, since the constructor now contains some text which should be part of the save function... which will make it hard to debug):

Qt Code: 
  1. // somewhere in the constructor
  2. 	extByMessage[ tr("Text files (*.txt *.utf8)") ] = ".txt";
  3. 	extByMessage[ tr("HTML Files (*.html *.htm)") ] = ".html";
  4.  
  5. 	QHashIterator<QString, QString> i(extByMessage);
  6.  	while (i.hasNext()) 
  7.  	{
  8.  		i.next();
  9.  		saveMessage += i.key();
  10.  		if (i.hasNext()) 
  11.  			saveMessage += ";;";
  12. 	}
  13.  
  14. // the save function
  15. 	QString s = QFileDialog::getSaveFileName(
  16. 		this,
  17. 		tr("Choose a file to save to"),
  18. 		lastDir,
  19. 		saveMessage,
  20. 		&sf
  21. 	);
  22.  
  23. 	if (s.isEmpty())
  24. 		return;
  25.  
  26. 	bool status;
  27.  
  28. 	// what if the users did not specify a suffix...?
  29. 	QFileInfo f( s );
  30. 	if (f.suffix().isEmpty())
  31. 	{
  32. 		// http://www.qtcentre.org/forum/f-qt-programming-2/t-qfiledialoggetsavefilename-default-extension-8503.html
  33. 		s += extByMessage[sf];
  34. 	}
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