[TYPO3-english] crawler error PDF

[Jesper Goos]

Hi

I am crwaling/indexing a bunch of PDF files and get this error when running 
the cron job:

Error: PDF version 1.6 -- xpdf supports version 1.5 (continuing anyway)
Error: PDF version 1.6 -- xpdf supports version 1.5 (continuing anyway)

Warning: mysql_num_rows(): supplied argument is not a valid MySQL result 
resource in 
/is/htdocs/wp1070663_QZF3KQY1IX/ewma.org/typo3/t3lib/class.t3lib_db.php on 
line 796

Warning: mysql_num_rows(): supplied argument is not a valid MySQL result 
resource in 
/is/htdocs/wp1070663_QZF3KQY1IX/ewma.org/typo3/t3lib/class.t3lib_db.php on 
line 796

Warning: mysql_fetch_assoc(): supplied argument is not a valid MySQL result 
resource in 
/is/htdocs/wp1070663_QZF3KQY1IX/ewma.org/typo3/t3lib/class.t3lib_db.php on 
line 809

Warning: mysql_num_rows(): supplied argument is not a valid MySQL result 
resource in 
/is/htdocs/wp1070663_QZF3KQY1IX/ewma.org/typo3/t3lib/class.t3lib_db.php on 
line 796


The line that is executed is:

/usr/local/bin/php /my/path/typo3/cli_dispatch.phpsh crawler

TYPO3: 4.2.3
crawler: 2.1.0
indexed_search: 2.11.0

Does anyone know what this could be?
Thanx
Jesper Goos