Twitter PHP Error

[davidpede]

Hi, am only using this extra for twitter but am getting a lot of the following errors in the modx log:

(ERROR @ /core/cache/includes/elements/modsnippet/85.include.cache.php : 751) PHP warning: Illegal string offset 'created_at_timestamp'

Line 751 is:

if(!$found and strtolower($val[$subkey]) > strtolower($tmp_val[$subkey])) {

Haven't got time to look into this right now, just wondering if anything stands out that could be causing error?