diff --git a/htdocs/core/class/html.formfile.class.php b/htdocs/core/class/html.formfile.class.php
index 239369b2a1c..565acd828b2 100644
--- a/htdocs/core/class/html.formfile.class.php
+++ b/htdocs/core/class/html.formfile.class.php
@@ -863,11 +863,15 @@ class FormFile
 					{
 						$fileinfo = pathinfo($file['name']);
 						print '<td align="center">';
-						$minifile=$fileinfo['filename'].'_mini.'.strtolower($fileinfo['extension']);	// Thumbs are created with filename in lower case
 						if (image_format_supported($file['name']) > 0)
 						{
-							print '<a href="'.DOL_URL_ROOT.'/viewimage.php?modulepart='.$modulepart.'&file='.urlencode($relativepath.$fileinfo['filename'].'.'.strtolower($fileinfo['extension'])).'" class="aphoto" target="_blank">';
-							print '<img border="0" height="'.$maxheightmini.'" src="'.DOL_URL_ROOT.'/viewimage.php?modulepart='.$modulepart.'&file='.urlencode($relativepath.'thumbs/'.$minifile).'" title="">';
+						    $minifile=getImageFileNameForSize($file['name'], '_mini', '.png'); // Thumbs are created with filename in lower case and with .png extension
+						    //print $relativepath.'<br>';
+						    //print $file['path'].'/'.$minifile.'<br>';
+						    if (! dol_is_file($file['path'].'/'.$minifile)) $minifile=getImageFileNameForSize($file['name'], '_mini', '.'.$fileinfo['extension']); // For old thumbs
+						    //print $file['path'].'/'.$minifile.'<br>';
+						    print '<a href="'.DOL_URL_ROOT.'/viewimage.php?modulepart='.$modulepart.'&file='.urlencode($relativepath.$fileinfo['filename'].'.'.strtolower($fileinfo['extension'])).'" class="aphoto" target="_blank">';
+							print '<img border="0" height="'.$maxheightmini.'" src="'.DOL_URL_ROOT.'/viewimage.php?modulepart='.$modulepart.'&file='.urlencode($relativepath.$minifile).'" title="">';
 							print '</a>';
 						}
 						else print '&nbsp;';
diff --git a/htdocs/core/lib/files.lib.php b/htdocs/core/lib/files.lib.php
index 4cac852a7ad..c6256475592 100644
--- a/htdocs/core/lib/files.lib.php
+++ b/htdocs/core/lib/files.lib.php
@@ -1469,7 +1469,9 @@ function dol_add_file_process($upload_dir, $allowoverwrite=0, $donotupdatesessio
 				// lowercase extension
 				$info = pathinfo($destpath);
 				$destpath = $info['dirname'].'/'.$info['filename'].'.'.strtolower($info['extension']);
-
+				$info = pathinfo($destfile);
+				$destfile = $info['filename'].'.'.strtolower($info['extension']);
+				    
 				$resupload = dol_move_uploaded_file($TFile['tmp_name'][$i], $destpath, $allowoverwrite, 0, $TFile['error'][$i], 0, $varfiles);
 				if (is_numeric($resupload) && $resupload > 0)
 				{
diff --git a/htdocs/core/lib/images.lib.php b/htdocs/core/lib/images.lib.php
index 20a58d7021c..669da7b751b 100644
--- a/htdocs/core/lib/images.lib.php
+++ b/htdocs/core/lib/images.lib.php
@@ -301,7 +301,7 @@ function dol_imageResizeOrCrop($file, $mode, $newWidth, $newHeight, $src_x=0, $s
  *    	@param     string	$extName        	Extension to differenciate thumb file name ('_small', '_mini')
  *    	@param     int		$quality        	Quality of compression (0=worst, 100=best)
  *      @param     string	$outdir           	Directory where to store thumb
- *      @param     int		$targetformat     	New format of target (1,2,3,... or 0 to keep old format)
+ *      @param     int		$targetformat     	New format of target (IMAGETYPE_GIF, IMAGETYPE_JPG, IMAGETYPE_PNG, IMAGETYPE_BMP, IMAGETYPE_WBMP ... or 0 to keep old format)
  *    	@return    string						Full path of thumb or '' if it fails
  */
 function vignette($file, $maxWidth = 160, $maxHeight = 120, $extName='_small', $quality=50, $outdir='thumbs', $targetformat=0)
@@ -473,6 +473,7 @@ function vignette($file, $maxWidth = 160, $maxHeight = 120, $extName='_small', $
 	}
 
 	// Initialisation des variables selon l'extension de l'image
+	// $targetformat is 0 by default, in such case, we keep original extension
 	switch($targetformat)
 	{
 		case IMAGETYPE_GIF:	    // 1
diff --git a/htdocs/core/modules/modStock.class.php b/htdocs/core/modules/modStock.class.php
index 67bebc0d6d7..81454a52222 100644
--- a/htdocs/core/modules/modStock.class.php
+++ b/htdocs/core/modules/modStock.class.php
@@ -189,13 +189,13 @@ class modStock extends DolibarrModules
 		$this->import_icon[$r]=$this->picto;
 		$this->import_entities_array[$r]=array();		// We define here only fields that use another icon that the one defined into import_icon
 		$this->import_tables_array[$r]=array('ps'=>MAIN_DB_PREFIX.'product_stock');
-		$this->import_fields_array[$r]=array('ps.fk_product'=>"Product*",'ps.fk_entrepot'=>"Warehouse*",'ps.reel'=>"Stock*",'ps.pmp'=>"PMP"	);
+		$this->import_fields_array[$r]=array('ps.fk_product'=>"Product*",'ps.fk_entrepot'=>"Warehouse*",'ps.reel'=>"Stock*");
 
 		$this->import_convertvalue_array[$r]=array(
 			'ps.fk_product'=>array('rule'=>'fetchidfromref','classfile'=>'/product/class/product.class.php','class'=>'Product','method'=>'fetch','element'=>'product'),
 			'ps.fk_entrepot'=>array('rule'=>'fetchidfromref','classfile'=>'/product/stock/class/entrepot.class.php','class'=>'Entrepot','method'=>'fetch','element'=>'label')
 		);
-		$this->import_examplevalues_array[$r]=array('ps.fk_product'=>"PREF123456",'ps.fk_entrepot'=>"ALM001",'ps.reel'=>"10",'ps.pmp'=>"25"
+		$this->import_examplevalues_array[$r]=array('ps.fk_product'=>"PREF123456",'ps.fk_entrepot'=>"ALM001",'ps.reel'=>"10"
 		);
 
 	}