This week in the regular Weekly Page Update emails that Facebook sends out they have been attatching the following message.
On April 26, we will be updating the size of the profile picture on all Pages. We are letting you know about this small change in advance so that you can update your profile picture on April 26. The new profile picture will be 160 x 160 pixels and will sit at 23 pixels from the left and 210 pixels from the top of the Page.
Below we have attached a mockup of how the new changes may look.
For all those people that have a very unique profile image and cover photo combination. You’ll need to rebuild those images again when this new format becomes live.