Index: src/core/qgsproject.cpp
===================================================================
--- src/core/qgsproject.cpp	(revision 14822)
+++ src/core/qgsproject.cpp	(working copy)
@@ -1367,6 +1367,13 @@
 
   QString srcPath = src;
   QString projPath = fileName();
+  QString queryString = "";
+  if( srcPath.contains("?"))
+  {
+	  int pos = srcPath.indexOf("?");
+	  queryString = srcPath.mid(pos);
+	  srcPath = srcPath.left(pos);
+  }
 
 #if defined(Q_OS_WIN)
   srcPath.replace( "\\", "/" );
@@ -1407,7 +1414,7 @@
   projElems.prepend( "" );
 #endif
 
-  return projElems.join( "/" );
+  return projElems.join( "/" ).append(queryString);
 }
 
 // return the absolute or relative path to write it to the project file
@@ -1419,6 +1426,13 @@
   }
 
   QString srcPath = src;
+  QString queryString = "";
+  if( srcPath.contains("?"))
+  {
+	  int pos = srcPath.indexOf("?");
+	  queryString = srcPath.mid(pos);
+	  srcPath = srcPath.left(pos);
+  }
   QString projPath = fileName();
 
 #if defined( Q_OS_WIN )
@@ -1483,7 +1497,7 @@
     srcElems.insert( 0, "." );
   }
 
-  return srcElems.join( "/" );
+  return srcElems.join( "/" ).append(queryString);
 }
 
 void QgsProject::setError( QString errorMessage )