Hi, I'm having this error since this new feature came out. Here is the complete error:
Fatal error: Allowed memory size of 33554432 bytes exhausted (tried to allocate 2071870 bytes) in /wp-includes/http.php on line 1033
If I use the "Automatic Upgrade Plugin" it works fine... I guess this http.php tries to download all the zip file in memory instead of buffering to disk.
As far I could see this plugin uses the Snoopy class for download the files needed.
Regards,
Sebastian