I recently upgraded to Qt 4.4.1, and after compiling my program and running it, I noticed that when the first modal dialog, a login popup appears, it does not allow me to click on any of the buttons in it anymore. In addition, I can not drag the login popup around like I normally should be able to. I broke down the code to a simple example, and the same exact thing happens: the dialog will appear, but I can not click on any of the buttons or fields in it. Here is the code for the simple example that has this problem:

Main.cpp:
Qt Code: 
  1. #include <QApplication>
  2.  
  3. #include "calculatorform.h"
  4.  
  5.  
  6.  int main(int argc, char *argv[]) {
  7. 	QApplication app(argc, argv);
  8.  
  9. 	//show the main window:
  10. 	FabwareMain calculator;
  11. 	calculator.show();
  12. 	return app.exec();
  13.  }
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Calculatorform.h:
Qt Code: 
  1. #ifndef CALCULATORFORM_H
  2.  #define CALCULATORFORM_H
  3. //user interface for this window:
  4. #include "ui_calculatorform.h"
  5.  
  6. //dialogs that are spawned from this window:
  7. #include "dialog_login.h"
  8.  
  9. #include "var_login.h"
  10.  
  11. //QT modules used by this window:
  12. #include <QString>
  13.  
  14.  class FabwareMain : public QMainWindow {
  15. 	Q_OBJECT
  16.  
  17. 	public:
  18. 		FabwareMain();
  19.  
  20. 	private slots:
  21.  
  22. 		void popupLogin();
  23.  
  24. 	private:
  25. 		//interface:
  26. 		Ui::FabwareMain ui;
  27.  
  28. 		//variables:
  29. 		var_login login; //stores last login information
  30.  };
  31.  
  32.  #endif
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Calculatorform.cpp:
Qt Code: 
  1. #include <QtGui>
  2.  
  3. #include "calculatorform.h"
  4. #include <QMessageBox>
  5. #include <QDebug>
  6. /*
  7. Constructor for main window:
  8. */
  9. FabwareMain::FabwareMain() {
  10. 	ui.setupUi(this);
  11.  
  12. 	connect( ui.actionLogin, SIGNAL( triggered() ), this, SLOT( popupLogin() ) );
  13.  
  14. }
  15.  
  16. //popup for login dialog:
  17. void FabwareMain::popupLogin() {
  18.  
  19. 	//create a dialog box:
  20. 	DialogLogin dlg(this);
  21.  
  22. 	//do something once we click OK:
  23. 	if( dlg.exec() == QDialog::Accepted ) {
  24. 		login = dlg.login;
  25.  
  26.  
  27.   	}
  28. }
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Dialog_login.h
Qt Code: 
  1. #ifndef DIALOG_LOGIN_H
  2. #define DIALOG_LOGIN_H
  3.  
  4. //user interface items:
  5. #include "ui_dialog_login.h"
  6.  
  7. //data structure items:
  8. #include "var_login.h"
  9.  
  10. class DialogLogin : public QDialog, private Ui::DialogLogin {
  11.  
  12. 	Q_OBJECT
  13.  
  14. 	public:
  15. 		//functions:
  16. 		DialogLogin(QWidget *parent = 0);
  17.  
  18.  
  19. 		//variables:
  20. 		var_login login;
  21.  
  22. 	private slots:
  23. 		void returnVars();
  24.  
  25. 	private:
  26.  
  27. };
  28.  
  29. #endif
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dialog_login.cpp:
Qt Code: 
  1. #include <QtGui>
  2.  
  3. #include "dialog_login.h"
  4.  
  5. //setup interface of main window:
  6. DialogLogin::DialogLogin(QWidget *parent) : QDialog(parent) {
  7.  
  8. 	setupUi(this);
  9.  
  10. 	//connect form item signals to slots that arent in the UI file here:
  11. 	connect(buttonBox, SIGNAL(accepted()), this, SLOT(returnVars()));
  12. 	connect(buttonBox, SIGNAL(rejected()), this, SLOT(reject()));
  13.  
  14. }
  15.  
  16. void DialogLogin::returnVars() {
  17.  
  18. 	login.username = userid->text();
  19. 	login.password = password->text();
  20. 	accept();
  21. }
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var_login.h:
Qt Code: 
  1. #ifndef VAR_LOGIN_H
  2. #define VAR_LOGIN_H
  3.  
  4. #include <QString>
  5.  
  6. class var_login {
  7.  
  8. 	public:
  9. 		QString username,
  10. 		password;
  11.  
  12. };
  13.  
  14. #endif
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