With the recent release of 4.8.7 many users are complaining about a profile issue after upgrading their install. This is a known bug in SocialEngine and should be fixed in a future release.
This article will contain the fix to that problem.
If this bug effects you, you will notice the error below when you access a members profile:
Fatal error: Call to a member function toValue() on a non-object in/application/modules/Fields/View/Helper/FieldBirthdate.php on line 45
In short, the above PHP file has become corrupt with the upgrade of SocialEngine 4.8.7
To fix this you need to upload another version of the corrupt PHP file.
I have attached a copy of a working version of the file to make everything easier for you.
Replace the file within the .zip with your one and this should fix any issues you had.