[[Ditto?parents=`38` &display=`5` &removeChunk=`Comments` &tpl=`DittoTemplateCenter` &language=`francais-utf8` &sortDir=`DESC` &paginate=`1` &paginateAlwaysShowLinks=`1` &id=`arc` &dateSource=`pub_date`]]
I guess you are using [+pub_date+] in your Ditto template chunk ’DittoTemplateCenter’.
The problem is that the date are in unix format, for example : "Published date : 1222502681."