[TYPO3-english] 4.5.3 backend is blank..

[ktt]

Hello,


On update of TYPO3 from 4.5.0 to 4.5.3 strange thing happened - backend become blank.
No errors in PHP nor in Apache logs, SQL and BE debug are silent as well.
typo3temp and temp_CACHED... were cleared as well.
Compression is set to false:
$TYPO3_CONF_VARS['FE']['compressionLevel'] = 'false';
 
It is interesting, that I can view the page source - it has data, but the page view is blank..:

<link rel="stylesheet" type="text/css" href="../typo3temp/compressor/ext-all-notheme-f3e538d5a3cb1403e07738e2ca3fee64.css?1325841955" media="all" />
<link rel="stylesheet" type="text/css" href="../typo3temp/compressor/xtheme-t3skin-032bf1f632675480ca89ee0f59b47411.css?1325841955" media="all" />

Maybe you would have some hints, since usual 'enable logs' do not give results this time.. 

Thank you in advance,
Kast