WordPress 3.6.1 update

I’m in the same boat, getting errors such as:

Warning: Illegal string offset ‘quote1’ in […]/plugins/quote-source/quote-source.php on line 110

This is how I fixed it:

Replace liines 110 and 111

$tmp_url = $meta['quote'. ($i+1)];
			$tmp_title = $meta['quote' . ($i+1) .'_title'];

with this:

if (isset($meta['quote' . ($i + 1)]))
		{
			$tmp_url = $meta['quote'. ($i+1)];
		}
		if (isset($meta['quote' . ($i + 1) . '_title']))
		{
			$tmp_title = $meta['quote' . ($i+1) .'_title'];
		}