A year ago I moved a site from one host to another, I needed .htaccess control and my host would not allow it. A workaround to not having .htaccess control was to add /index.php/ to every page which allowed wordpress permalinks to function.
When I made the move I removed all instances of /index.php/ from every link, file and image. I also included an /index.php/ to / command in my .htaccess file so that no pages display the workaround and all are 301 redirected to the version without it.
It went quite well and indexing/traffic did not suffer. Out of the blue my Google webmaster tools has begun displaying lots of "Crawl Errors" for pages that contain /index.php/. Likewise any regular page that has expired/been removed shows dozens of urls pointing to each, all containing /index.php/.
By out of the blue I mean it's been over a year now, so why now? I'm inclined to ignore it, traffic is still not suffering, but I'm curious as to what changed on Google's end because nothing changed on mine. Ideas?