Piwik 2.14.1 + API = zend_mm_heap corrupted ??? (3 replies)

Hey there,
since we upgraded to Version 2.14.1 our automated Site/User creation out of our CMS isn't working anymore. (creating Site & User over API)

- addSite works
- addUser works excactly 1 Time after Apache restart ... when calling it a second time I always get "zend_mm_heap corrupted" within Apache Error Log
That's the call: http://stats.domain.at/?module=API&token_auth=myToken&format=php&method=UsersManager.addUser&userLogin=user_6057&password=meinPassWord&email=stats_6057@stats.local
- Need to restart Apache to get it working once again ...

- CentOS Linux release 7.1.1503 (Core)
- Apache/2.4.6
- PHP/5.4.16

Not sure what to try next on this Problem?!? Hope someone here can help me ...

Thank you, bye from Austria
Andreas Schnederle-Wagner