Search in Google & Duckduckgo doesn't yield much useful instructions. But out of a sudden a bulb lights up, this could be due to the mouse gestures that is being mischievous all these times!
It turns out that turning off the "Swipe between pages" in Mouse -> More Gestures does disable this mischievous behavior. :)
Strict Standards: Only variables should be assigned by reference in /usr/local/www/phpPgAdmin/classes/database/Connection.php on line 23 Warning: Cannot modify header information - headers already sent by (output started at /usr/local/www/phpPgAdmin/classes/database/Connection.php:23) in /usr/local/www/phpPgAdmin/classes/Misc.php on line 540
Seems like php 5.4.4 imposed some extra measure as best practice.
Although phpPgAdmin works as usual, the error message is annoying. Plus, it is kind of bad to show what potentially can be exploit.
To turn off these error messages, just tweak the below parameter in /usr/local/etc/php.ini :