I m currently having exactly the same problem as tiffiney, I upgraded automatically my wordpress and got that message:
Fatal error: Cannot redeclare get_link() (previously declared in /homez.311/thebomba/www/wp-includes/bookmark.php:93) in /homez.311/thebomba/www/wp-includes/deprecated.php on line 2053
I was using "Lysa" theme and I was wandering if maybe it was compatible or not with the new wordpress. I dont have access to /wp-admin so I can't change anything, I tried to change the names on my FTP but it didnt work either.
I give you also the line of code that looks wrong (the number 2052 and 2053 of deprecated.php)
Note that I tried what you said but I didn't try the manual update as I really have no idea of how to do it. I m kind of a noob
Here is the line of code:
2052 : return get_bookmark($bookmark_id, $output, $filter );
2053 : }
Thank you !