Notice [PHP]: Only variable references should be returned by reference in file class/module.textsanitizer.php line 257
Notice [PHP]: Only variable references should be returned by reference in file kernel/object.php line 289
Notice [PHP]: Only variable references should be returned by reference in file include/functions.php line 493
Notice [PHP]: Only variables should be assigned by reference in file include/xoopscodes.php line 84
Notice [PHP]: Only variable references should be returned by reference in file class/database/database.php line 128
Notice [PHP]: Only variables should be assigned by reference in file class/database/mysqldatabase.php line 239
Notice [PHP]: Only variable references should be returned by reference in file class/database/mysqldatabase.php line 386
Notice [PHP]: Only variables should be assigned by reference in file header.php line 136
Notice [PHP]: Only variable references should be returned by reference in file class/module.textsanitizer.php line 257
Notice [PHP]: Only variable references should be returned by reference in file kernel/object.php line 289
Notice [PHP]: Only variables should be assigned by reference in file class/module.textsanitizer.php line 288
Notice [PHP]: Only variable references should be returned by reference in file class/module.textsanitizer.php line 135
Notice [PHP]: Only variable references should be returned by reference in file class/database/database.php line 128
Notice [PHP]: Only variables should be assigned by reference in file class/module.textsanitizer.php line 119
Notice [PHP]: Only variables should be assigned by reference in file class/module.textsanitizer.php line 119
Notice [PHP]: Only variables should be assigned by reference in file class/module.textsanitizer.php line 119
Notice [PHP]: Only variables should be assigned by reference in file class/module.textsanitizer.php line 119
Notice [PHP]: Only variables should be assigned by reference in file class/module.textsanitizer.php line 119
Notice [PHP]: Only variables should be assigned by reference in file class/module.textsanitizer.php line 119
Notice [PHP]: Only variables should be assigned by reference in file class/module.textsanitizer.php line 119
Notice [PHP]: Only variables should be assigned by reference in file class/module.textsanitizer.php line 119
Notice [PHP]: Only variables should be assigned by reference in file class/module.textsanitizer.php line 119
Notice [PHP]: Only variables should be assigned by reference in file class/module.textsanitizer.php line 119
Notice [PHP]: Only variables should be assigned by reference in file class/module.textsanitizer.php line 119
Notice [PHP]: Only variables should be assigned by reference in file class/module.textsanitizer.php line 119
Notice [PHP]: Only variables should be assigned by reference in file class/module.textsanitizer.php line 119
Notice [PHP]: Only variables should be assigned by reference in file class/module.textsanitizer.php line 119
Notice [PHP]: Only variables should be assigned by reference in file class/module.textsanitizer.php line 119
Notice [PHP]: Only variables should be assigned by reference in file class/module.textsanitizer.php line 119
Notice [PHP]: Only variables should be assigned by reference in file class/module.textsanitizer.php line 119
Notice [PHP]: Only variable references should be returned by reference in file class/module.textsanitizer.php line 204
Notice [PHP]: Only variables should be assigned by reference in file class/module.textsanitizer.php line 307
Notice [PHP]: Only variable references should be returned by reference in file include/functions.php line 493
Notice [PHP]: Only variables should be assigned by reference in file class/database/mysqldatabase.php line 239
Notice [PHP]: Only variable references should be returned by reference in file class/database/mysqldatabase.php line 386
Notice [PHP]: Only variable references should be returned by reference in file include/functions.php line 493
Notice [PHP]: Only variable references should be returned by reference in file include/functions.php line 493
Notice [PHP]: Only variables should be assigned by reference in file class/database/mysqldatabase.php line 239
Notice [PHP]: Only variable references should be returned by reference in file class/database/mysqldatabase.php line 386
Notice [PHP]: Only variable references should be returned by reference in file kernel/comment.php line 327
Notice [PHP]: Only variable references should be returned by reference in file include/functions.php line 493

Those are no big deal they are just Notices. Don't worry we all get them. They happen because of unclean programming of modules.

just turn of debug mode and enjoy.

Thanks dude...