Fatal error: plugins won't install

[GrendelKhan{TSU]

just upgraded to 3.6.0, now I can't install any new plugins!!

when I try to install a product...
The install keeps going and going and going.....and progress bar goes off the right edge forever too. :/

then below the progress text area...it says:

Fatal error: Invalid row in the style table in /includes/adminfunctions_template.php on line 2293

I checked and line 2293 is:

// #############################################################################
/**
* Builds the stylecache and saves it into the datastore
*
* @return	array	$stylecache
*/
function build_style_datastore()
{
	global $stylecache, $vbulletin;

	if (!is_array($stylecache))
	{
		cache_styles();
		// this should not ever be needed unless the user has edited the database
		if (STYLECOUNT != sizeof($stylecache))
		{
			trigger_error('Invalid row in the style table', E_USER_ERROR);
		}
	}

	$localstylecache = array();

	foreach ($stylecache AS $styleid => $style)
	{
		$localstyle = array();
		$localstyle['styleid'] = $style['styleid'];
		$localstyle['title'] = $style['title'];
		$localstyle['parentid'] = $style['parentid'];
		$localstyle['displayorder'] = $style['displayorder'];
		$localstyle['userselect'] = $style['userselect'];

		($hook = vBulletinHook::fetch_hook('admin_style_datastore')) ? eval($hook) : false;

		$datastorecache["$localstyle[parentid]"]["$localstyle[displayorder]"][] = $localstyle;
	}

	build_datastore('stylecache', serialize($datastorecache), 1);

	return $datastorecache;
}

// #############################################################################

I even reinstalled that file from fresh 3.6.0 gold file.
still same problem.

any ideas? HALP!!! :hurt: