BroOf saidWhat to do for users who have file_get_contents function disabled for crossdomains ( at least to not show the warning ) ?
Update notifier in WordPress theme options panel is the best solution for WordPress.
I use curl for my update notifier as well as a file_get_contents fallback. To prevent the error I think using @file_get_contents will suppress the error.
It will be a wonderfull feature, we all have been missing this for long time. I tried out to seutp the version number in the file title, but it was a mess for crosslinking seo references after a few months, so i just avoid it.
I use FAQS as update log. It’ s shame that faqs are not editable (hope this will be an upcoming feature soon too).