[TYPO3-mvc] Fatal error: Class 'Tx_Extbase_Persistence_Mapper_DataMapFactory' not found after extbase 1.0.2 -> 1.1.0?

[Gerhard Mehsel]

Hello,

I made a small extension with extbase / fluid TYPO3 4.3.3 and extbase 1.0.2.
After deplyoing that extension to another TYPO3 4.3.3 everthing were ok. 
Now my hoster patched this TYPO3 4.3.3 with the security fixes from 
today (after 4.3.4 came out) and now I get the following error, the 
extension is not longer working at all:

Fatal error: Class 'Tx_Extbase_Persistence_Mapper_DataMapFactory' not 
found in /html/typo3/typo3_src-4.3.3/t3lib/class.t3lib_div.php on line 5020

Now it is extbase 1.1.0
What do I have to change to get that extension working with extbase 
1.1.0 again? I have a model, a repository, a controller and a fluid 
template in that extension.

Can somebody give me a hint?

Thank you a lot,
Gerd