Updating WordPress Core from 4.1 to 4.1.1 or 4.1.2 fails

I am using:

• php: v.5.5.21
• WordPress: v.4.1
• W3TC: v.0.9.4.1

When v.4.1.1 of WordPress became available i tried from “Dashboard” -> “Updates” -> “Update Now” (failed with blank page)

When v.4.1.2 of WordPress became available i tried from “Dashboard” -> “Updates” -> “Update Now” (failed with blank page)

I said… let’s deactivate some plugins.
I started with W3TC and updating the WordPress Core WORKED!

This is my debug.log when i deactivated and activated back the plugin

[22-Apr-2015 13:08:34 UTC] PHP Warning:  include(/wp-content/advanced-cache.php): failed to open stream: No such file or directory in /wp-settings.php on line 65
[22-Apr-2015 13:08:34 UTC] PHP Warning:  include(): Failed opening '/wp-content/advanced-cache.php' for inclusion (include_path='.:/usr/local/lib/php:/usr/local/php5/lib/pear') in /wp-settings.php on line 65
[22-Apr-2015 13:08:49 UTC] PHP Warning:  include(/wp-content/advanced-cache.php): failed to open stream: No such file or directory in /wp-settings.php on line 65
[22-Apr-2015 13:08:49 UTC] PHP Warning:  include(): Failed opening '/wp-content/advanced-cache.php' for inclusion (include_path='.:/usr/local/lib/php:/usr/local/php5/lib/pear') in /wp-settings.php on line 65
[22-Apr-2015 13:08:55 UTC] PHP Warning:  include(/wp-content/advanced-cache.php): failed to open stream: No such file or directory in /wp-settings.php on line 65
[22-Apr-2015 13:08:55 UTC] PHP Warning:  include(): Failed opening '/wp-content/advanced-cache.php' for inclusion (include_path='.:/usr/local/lib/php:/usr/local/php5/lib/pear') in /wp-settings.php on line 65
[22-Apr-2015 13:09:09 UTC] PHP Warning:  include(/wp-content/advanced-cache.php): failed to open stream: No such file or directory in /wp-settings.php on line 65
[22-Apr-2015 13:09:09 UTC] PHP Warning:  include(): Failed opening '/wp-content/advanced-cache.php' for inclusion (include_path='.:/usr/local/lib/php:/usr/local/php5/lib/pear') in /wp-settings.php on line 65
[22-Apr-2015 13:09:14 UTC] PHP Warning:  include(/wp-content/advanced-cache.php): failed to open stream: No such file or directory in /wp-settings.php on line 65
[22-Apr-2015 13:09:14 UTC] PHP Warning:  include(): Failed opening '/wp-content/advanced-cache.php' for inclusion (include_path='.:/usr/local/lib/php:/usr/local/php5/lib/pear') in /wp-settings.php on line 65
[22-Apr-2015 13:10:14 UTC] PHP Warning:  include(/wp-content/advanced-cache.php): failed to open stream: No such file or directory in /wp-settings.php on line 65
[22-Apr-2015 13:10:14 UTC] PHP Warning:  include(): Failed opening '/wp-content/advanced-cache.php' for inclusion (include_path='.:/usr/local/lib/php:/usr/local/php5/lib/pear') in /wp-settings.php on line 65
[22-Apr-2015 13:10:15 UTC] PHP Warning:  include(/wp-content/advanced-cache.php): failed to open stream: No such file or directory in /wp-settings.php on line 65
[22-Apr-2015 13:10:15 UTC] PHP Warning:  include(): Failed opening '/wp-content/advanced-cache.php' for inclusion (include_path='.:/usr/local/lib/php:/usr/local/php5/lib/pear') in /wp-settings.php on line 65
[22-Apr-2015 13:10:21 UTC] PHP Warning:  include(/wp-content/advanced-cache.php): failed to open stream: No such file or directory in /wp-settings.php on line 65
[22-Apr-2015 13:10:21 UTC] PHP Warning:  include(): Failed opening '/wp-content/advanced-cache.php' for inclusion (include_path='.:/usr/local/lib/php:/usr/local/php5/lib/pear') in /wp-settings.php on line 65
[22-Apr-2015 13:10:23 UTC] PHP Warning:  include(/wp-content/advanced-cache.php): failed to open stream: No such file or directory in /wp-settings.php on line 65
[22-Apr-2015 13:10:23 UTC] PHP Warning:  include(): Failed opening '/wp-content/advanced-cache.php' for inclusion (include_path='.:/usr/local/lib/php:/usr/local/php5/lib/pear') in /wp-settings.php on line 65
[22-Apr-2015 13:10:25 UTC] PHP Warning:  include(/wp-content/advanced-cache.php): failed to open stream: No such file or directory in /wp-settings.php on line 65
[22-Apr-2015 13:10:25 UTC] PHP Warning:  include(): Failed opening '/wp-content/advanced-cache.php' for inclusion (include_path='.:/usr/local/lib/php:/usr/local/php5/lib/pear') in /wp-settings.php on line 65
[22-Apr-2015 13:10:28 UTC] PHP Warning:  include(/wp-content/advanced-cache.php): failed to open stream: No such file or directory in /wp-settings.php on line 65
[22-Apr-2015 13:10:28 UTC] PHP Warning:  include(): Failed opening '/wp-content/advanced-cache.php' for inclusion (include_path='.:/usr/local/lib/php:/usr/local/php5/lib/pear') in /wp-settings.php on line 65

My next test, after activating W3TC, was to “Dashboard” -> “Updates” -> “Re-install Now” (failed with blank page)

https://www.ads-software.com/plugins/w3-total-cache/