currently using wheezy with php 5.5.30 update - switcher also installed and working as expected
cleared apc line from:
<package>php-apc</package>
docs/Debian/packages-wheezy.xml
and ran installer..
Error specifically shows:
[ERROR] main::setupUpdateDatabase: PHP Warning: PHP Startup: Unable to load dynamic library '/usr/lib/php5/20121212/apc.so' - /usr/lib/php5/20121212/apc.so: cannot open shared object file: No such file or directory in Unknown on line 0
PHP Warning: DateTime::createFromFormat(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /var/www/imscp/gui/library/Functions/Intl.php on line 162
See its complaining about Time but this has never had an issue previously... - easy enough to update once is back up and running though.