diff --git a/common.pri b/common.pri
index b69a89e..9b07f01 100644
--- a/common.pri
+++ b/common.pri
@@ -128,7 +128,7 @@ RCC_DIR        = $${ARCH_DIR}/$${BUILD_TYPE}/rcc
 
 LIMEREPORT_VERSION_MAJOR = 1
 LIMEREPORT_VERSION_MINOR = 5
-LIMEREPORT_VERSION_RELEASE = 31
+LIMEREPORT_VERSION_RELEASE = 32
 
 LIMEREPORT_VERSION = '$${LIMEREPORT_VERSION_MAJOR}.$${LIMEREPORT_VERSION_MINOR}.$${LIMEREPORT_VERSION_RELEASE}'
 DEFINES *= LIMEREPORT_VERSION_STR=\\\"$${LIMEREPORT_VERSION}\\\"
diff --git a/limereport/lrbasedesignintf.h b/limereport/lrbasedesignintf.h
index 6887ca3..597d04a 100644
--- a/limereport/lrbasedesignintf.h
+++ b/limereport/lrbasedesignintf.h
@@ -468,7 +468,7 @@ public:
     QVariant getBookMark(const QString& key);
     void copyBookmarks(BookmarkContainerDesignIntf* source);
 private:
-    QMap<QString,QVariant>  m_bookmarks;
+    QHash<QString,QVariant>  m_bookmarks;
 };
 
 } //namespace LimeReport
diff --git a/limereport/lrdatadesignintf.cpp b/limereport/lrdatadesignintf.cpp
index 6fa78a5..eb4b564 100644
--- a/limereport/lrdatadesignintf.cpp
+++ b/limereport/lrdatadesignintf.cpp
@@ -719,24 +719,35 @@ QVariant CallbackDatasource::dataByKeyField(const QString& columnName, const QSt
 {
     int backupCurrentRow = m_currentRow;
     QVariant result = QVariant();
-    first();
-    if (!checkIfEmpty()){
-        int currentRow = 0;
-        do {
-            QVariant key = callbackData(keyColumnName, currentRow);
+
+    m_currentRow = m_lastKeyRow;
+    if (next()){
+        for (int i = 0; i < 10; ++i){
+            QVariant key = callbackData(keyColumnName, m_currentRow);
             if (key == keyData){
-                result = callbackData(columnName, currentRow);
-                break;
+                result = callbackData(columnName, m_currentRow);
+                m_lastKeyRow = m_currentRow;
+                m_currentRow = backupCurrentRow;
+                return result;
             }
-            currentRow++;
-        } while (next());
+            if (!next()) break;
+        }
     }
 
     first();
-    if (backupCurrentRow != -1){
-        for (int i = 0; i < backupCurrentRow; ++i)
-            next();
+    if (!checkIfEmpty()){
+        do {
+            QVariant key = callbackData(keyColumnName, m_currentRow);
+            if (key == keyData){
+                result = callbackData(columnName, m_currentRow);
+                m_lastKeyRow = m_currentRow;
+                m_currentRow = backupCurrentRow;
+                return result;
+            }
+        } while (next());
     }
+
+    m_currentRow = backupCurrentRow;
     return result;
 }
 
diff --git a/limereport/lrdatadesignintf.h b/limereport/lrdatadesignintf.h
index c682fc4..867cbbb 100644
--- a/limereport/lrdatadesignintf.h
+++ b/limereport/lrdatadesignintf.h
@@ -410,8 +410,8 @@ private:
 class CallbackDatasource :public ICallbackDatasource, public IDataSource {
     Q_OBJECT
 public:
-    CallbackDatasource(): m_currentRow(-1), m_eof(false), m_columnCount(-1),
-        m_rowCount(-1), m_getDataFromCache(false){}
+    CallbackDatasource():  m_currentRow(-1), m_eof(false), m_columnCount(-1),
+                           m_rowCount(-1), m_getDataFromCache(false), m_lastKeyRow(0){}
     bool next();
     bool hasNext(){ if (!m_eof) return checkNextRecord(m_currentRow); else return false;}
     bool prior();
@@ -431,6 +431,7 @@ public:
 private:
     bool checkNextRecord(int recordNum);
     bool checkIfEmpty();
+    QVariant callbackData(const QString& columnName, int row);
 private:
     QVector<QString> m_headers;
     int m_currentRow;
@@ -439,7 +440,7 @@ private:
     int m_rowCount;
     QHash<QString, QVariant> m_valuesCache;
     bool m_getDataFromCache;
-    QVariant callbackData(const QString& columnName, int row);
+    int m_lastKeyRow;
 };
 
 class CallbackDatasourceHolder :public QObject, public IDataSourceHolder{
diff --git a/limereport/lrreportdesignwidget.cpp b/limereport/lrreportdesignwidget.cpp
index a1e8a3b..acd6298 100644
--- a/limereport/lrreportdesignwidget.cpp
+++ b/limereport/lrreportdesignwidget.cpp
@@ -722,6 +722,7 @@ void ReportDesignWidget::initThemeIfExist(const QString &themeName, const QStrin
 
 void ReportDesignWidget::previewReport()
 {
+    if (report()->isBusy()) return;
     prepareReport();
 #ifdef HAVE_QTDESIGNER_INTEGRATION
     updateDialogs();
@@ -734,6 +735,7 @@ void ReportDesignWidget::previewReport()
 
 void ReportDesignWidget::printReport()
 {
+    if (report()->isBusy()) return;
     prepareReport();
 #ifdef HAVE_QTDESIGNER_INTEGRATION
     updateDialogs();
diff --git a/limereport/lrreportdesignwindow.cpp b/limereport/lrreportdesignwindow.cpp
index 5181c7b..d863ee9 100644
--- a/limereport/lrreportdesignwindow.cpp
+++ b/limereport/lrreportdesignwindow.cpp
@@ -1264,7 +1264,9 @@ void ReportDesignWindow::slotPrintReport()
 
 void ReportDesignWindow::slotPreviewReport()
 {
+    m_previewReportAction->setDisabled(true);
     m_reportDesignWidget->previewReport();
+    m_previewReportAction->setDisabled(false);
 }
 
 void ReportDesignWindow::slotItemActionCliked()
diff --git a/limereport/lrreportengine_p.h b/limereport/lrreportengine_p.h
index 2453b90..efb2881 100644
--- a/limereport/lrreportengine_p.h
+++ b/limereport/lrreportengine_p.h
@@ -113,6 +113,7 @@ public:
     virtual void                    cancelRender() = 0;
     virtual void                    setShowProgressDialog(bool value) = 0;
     virtual bool                    isShowProgressDialog() const = 0;
+    virtual bool                    isBusy() = 0;
 };
 
 class PrintProcessor{
diff --git a/limereport/lrreportrender.cpp b/limereport/lrreportrender.cpp
index 49af8cc..0752a2e 100644
--- a/limereport/lrreportrender.cpp
+++ b/limereport/lrreportrender.cpp
@@ -261,11 +261,11 @@ void ReportRender::renderPage(PageItemDesignIntf* patternPage, bool isTOC, bool
     renderReportHeader(m_patternPageItem, AfterPageHeader);
 
     BandDesignIntf* lastRenderedBand = 0;
-    for (int i=0;i<m_patternPageItem->dataBandCount() && !m_renderCanceled;i++){
+    for (int i=0;i<m_patternPageItem->dataBandCount() && !m_renderCanceled; i++){
         lastRenderedBand = m_patternPageItem->dataBandAt(i);
         initDatasource(lastRenderedBand->datasourceName());
         renderDataBand(lastRenderedBand);
-        if (i<m_patternPageItem->dataBandCount()-1) closeFooterGroup(lastRenderedBand);
+        if (i < m_patternPageItem->dataBandCount()-1) closeFooterGroup(lastRenderedBand);
     }
 
     if (reportFooter)
@@ -475,7 +475,7 @@ BandDesignIntf* ReportRender::renderBand(BandDesignIntf *patternBand, BandDesign
         if (bandData){
            bandClone = bandData;
         } else {
-            bandClone=renderData(patternBand);
+            bandClone = renderData(patternBand);
         }
 
         if (isLast) bandClone->setBootomSpace(1);
@@ -543,8 +543,10 @@ BandDesignIntf* ReportRender::renderBand(BandDesignIntf *patternBand, BandDesign
                                 savePage();
                                 startNewPage();
                                 if (!bandIsSliced){
+                                    BandDesignIntf* t = renderData(patternBand);
+                                    t->copyBookmarks(bandClone);
                                     delete bandClone;
-                                    bandClone = renderData(patternBand);
+                                    bandClone = t;
                                 }
                             }
                             if (!registerBand(bandClone)) {