Broken links to posts

recently upgraded to 4.4.1 and updated a few plugins and the links to the individual posts have stopped working – other links (side menu) seem to be fine.

I’ve tried uninstalling all plugins and that didn’t fix the problem. Tried a new theme and that DOES fix the problem – so it’s something to do with my old them after the upgrade? I’m not sure what to do to resolve the problem. Any help would be great.

I also tried a few different settings with the permalinks but that didn’t help. Site is zpply dot com