simplepie.inc is old and has deprecated/strict notices

simplepie.inc (v 1.2, currently on your plugin) has several

assigning the return value of new by reference is deprecated

notices as well as many

Non-static method should not be called statically

strict notices.

Please consider updating to simplepie 1.3.1 (latest version as of now) or fixing all those notices. Here’s a file I fixed as a workaround, by removing &s and adding “static” keywords: https://drive.google.com/file/d/0B7JEImS_HANHRjl1SGV1WWlUVFE/edit?usp=sharing

https://wordpress.org/plugins/social-media-mashup/