[TYPO3] mysql error on top of every FE page :-/

[Andreas Balzer]

Hi!
If i enable sql debug output, i get the following errors on top of every
page as long as these pages are not cached. What can i do? Where do the
errors come from?

Here are the errors:
caller	t3lib_DB::sql_query
ERROR	You have an error in your SQL syntax; check the manual that
corresponds to your MySQL server version for the right syntax to use
near '' at line 1
lastBuiltQuery	SELECT md5hash, imagewidth, imageheight
FROM cache_imagesizes
WHERE
md5filename='c8ff80253f39aaf85d70a2a779046618'
debug_backtrace	require // include // tspagegen::rendercontent //
ux_tslib_cobj->cobjget // ux_tslib_cobj->cobjgetsingle //
ux_tslib_cobj->content // ux_tslib_cobj->cobjgetsingle //
ux_tslib_cobj->cobjgetsingle // ux_tslib_cobj->casefunc //
ux_tslib_cobj->cobjgetsingle // ux_tslib_cobj->cobj_array //
ux_tslib_cobj->cobjget // ux_tslib_cobj->cobjgetsingle //
ux_tslib_cobj->cobjgetsingle // ux_tslib_cobj->user //
ux_tslib_cobj->calluserfunction // call_user_method //
tx_cssstyledcontent_pi1->render_textpic // ux_tslib_cobj->image //
ux_tslib_cobj->cimage // t3lib_db->sql_query // t3lib_db->debug
caller	t3lib_DB::sql_query
ERROR	You have an error in your SQL syntax; check the manual that
corresponds to your MySQL server version for the right syntax to use
near '' at line 1
lastBuiltQuery	SELECT md5hash, imagewidth, imageheight
FROM cache_imagesizes
WHERE
md5filename='5d7cddda3684c21a08c490efc676519c'
debug_backtrace	require // include // tspagegen::rendercontent //
ux_tslib_cobj->cobjget // ux_tslib_cobj->cobjgetsingle //
ux_tslib_cobj->user // ux_tslib_cobj->calluserfunction //
call_user_method // tx_ttnews->main_news // tx_ttnews->displaylist //
tx_ttnews->getlistcontent // tx_ttnews->getitemmarkerarray //
tx_ttnews->getimagemarkers // ux_tslib_cobj->image //
ux_tslib_cobj->cimage // t3lib_db->sql_query // t3lib_db->debug
caller	t3lib_DB::sql_query
ERROR	You have an error in your SQL syntax; check the manual that
corresponds to your MySQL server version for the right syntax to use
near '' at line 1
lastBuiltQuery	SELECT md5hash, imagewidth, imageheight
FROM cache_imagesizes
WHERE
md5filename='178de6b8f9151b6c28cba3a9380230c6'
debug_backtrace	require // include // tspagegen::rendercontent //
ux_tslib_cobj->cobjget // ux_tslib_cobj->cobjgetsingle //
ux_tslib_cobj->user // ux_tslib_cobj->calluserfunction //
call_user_method // tx_ttnews->main_news // tx_ttnews->displaylist //
tx_ttnews->getlistcontent // tx_ttnews->getitemmarkerarray //
tx_ttnews->getimagemarkers // ux_tslib_cobj->image //
ux_tslib_cobj->cimage // t3lib_db->sql_query // t3lib_db->debug
caller	t3lib_DB::sql_query
ERROR	You have an error in your SQL syntax; check the manual that
corresponds to your MySQL server version for the right syntax to use
near '' at line 1
lastBuiltQuery	SELECT md5hash, imagewidth, imageheight
FROM cache_imagesizes
WHERE
md5filename='8e10bc1af7036929b4a129346984503f'
debug_backtrace	require // include // tspagegen::rendercontent //
ux_tslib_cobj->cobjget // ux_tslib_cobj->cobjgetsingle //
ux_tslib_cobj->user // ux_tslib_cobj->calluserfunction //
call_user_method // tx_ttnews->main_news // tx_ttnews->displaylist //
tx_ttnews->getlistcontent // tx_ttnews->getitemmarkerarray //
tx_ttnews->getimagemarkers // ux_tslib_cobj->image //
ux_tslib_cobj->cimage // t3lib_db->sql_query // t3lib_db->debug




Thanks for any help/idea/solution!

Greetings
Andreas