Error joomla array_merge(): Argument #1 is not an array

Hi !
I have this error on my site
array_merge(): Argument #1 is not an array in /home/public_html/libraries/cms/installer/installer.php on line 1867
J3.2.0
http://www.sc2.osica.ro

Hi.
When? During installation module/component/plugin?
Please add here name of installed extension?
Where front-end or back-end ?

array_merge(): Argument #1 is not an array...

I've been using Joomla for quite some time now, and I've never seen this error. I don't think it has relationship with our template. It looks like problem with Joomla installer. Because on web I've found few "similar" errors on different joomla versions (1.5/2.5) or even in Drupal. So maybe problem is with server settings.

Could you try to unzip the extension archive in you tmp directory and then process the install through the "install from directory method"?

Hi !
I've already update my site to J 3.2.0.
The error appears in my apache error log
Only extensions installed, were came with quickstart package, nothing else.
And i obeserve that the site work slower than the other site that i have with J3.2.0.
I am sure this isn't a server issue because other site with J3.2.0 were not throwing this error.
I know this isn't related with subdomains.

Did you updated template and all GK modules ? If not please do this step.

By the way,

/home/public_html/libraries/cms/installer/installer.php

As you see this file wasn't modified by us. Because we don't / didn't changed any core files. And now after you made migration do 3.2, especially.

And i obeserve that the site work slower than the other site that i have with J3.2.0.

Other sites could have different settings, modules enabled, optimization enabled, smaller images etc... hard to say why.

The only solution to check this could be detailed analysis - what causes delays.