[TYPO3-dev] Errorlog: The page is not configured!

[Raphael Weber]

hi,

i´ve just posted this issue in the german list, but unfortunately it´s 
not been solved yet.

Several Websites of my TYPO3 4.5.3 use a special PAGE-type to generate 
dynamically CSS-Data:

dynCSS = PAGE
dynCSS.typeNum = 31
...
dynCSS.20 < lib.dynamicstylesheet

page.headerData.5 = TEXT
page.headerData.5.value = <link rel="stylesheet" type="text/css" 
href="index.php?id={TSFE:id}&amp;type=31" />


This works fine in the frontend but recently I noticed, that the 
Errorlog is documenting the following Error:
"Uncaught TYPO3 Exception: The page is not configured! [type= 31][] | 
RuntimeException thrown in file 
/[...]/typo3_src/typo3_src-4.5.3/typo3/sysext/cms/tslib/class.tslib_fe.php 
in line 2080"

Whats happening here? And why is TYPO3 looking for the type "[type= 
31][]" (and not for "[type= 31]")?

Any ideas or hints to solve this problem?

TYPO3 4.5.3
PHP-Version: 5.3.5

regards,
	raphael