--- a/Plugins/VcsPlugins/vcsMercurial/HgTagDialog.py	Tue Mar 18 19:23:35 2014 +0100
+++ b/Plugins/VcsPlugins/vcsMercurial/HgTagDialog.py	Wed Mar 19 19:26:30 2014 +0100
@@ -53,7 +53,7 @@
         
         @return tuple of string and int (tag, tag operation)
         """
-        tag = self.tagCombo.currentText()
+        tag = self.tagCombo.currentText().replace(" ", "_")
         tagOp = 0
         if self.createRegularButton.isChecked():
             tagOp = HgTagDialog.CreateRegularTag