Happening with wordpress, on new installs + new dbs. Accessing wp-admin gives blank page and returning this error:

Code:
[notice] child pid xxxxx exit signal Segmentation fault (11)
Everytime I try to access wp-admin, after login pops out one of this errors, every attempt to login result in this error.

I have enabled coredump and this is the error I get from the core file:

Code:
#0  0x00002ae56dc22b50 in zend_hash_num_elements () from /usr/lib/apache2/modules/libphp5.so
I have tried reinstall apache2, should I try reinstall php? I don't know...