Add comment to warn about a bug

htdocs/core/lib/pdf.lib.php

@@ -427,7 +427,7 @@ function pdf_pagehead(&$pdf,$outputlangs,$page_height)
 	global $conf;
 
 	// Add a background image on document
-	if (! empty($conf->global->MAIN_USE_BACKGROUND_ON_PDF))
+	if (! empty($conf->global->MAIN_USE_BACKGROUND_ON_PDF))		// Warning, this option make TCPDF generation beeing crazy and some content disappeared behin the image
 	{
         $pdf->SetAutoPageBreak(0,0);	// Disable auto pagebreak before adding image
 		$pdf->Image($conf->mycompany->dir_output.'/logos/'.$conf->global->MAIN_USE_BACKGROUND_ON_PDF, (isset($conf->global->MAIN_USE_BACKGROUND_ON_PDF_X)?$conf->global->MAIN_USE_BACKGROUND_ON_PDF_X:0), (isset($conf->global->MAIN_USE_BACKGROUND_ON_PDF_Y)?$conf->global->MAIN_USE_BACKGROUND_ON_PDF_Y:0), 0, $page_height);