The update functions are part of the WP core. No others have reported this problem yet. The plugin is not the cause.
Here are some ideas for you….
Check your server settings:
Are you still using PHP4? PHP5 is highly recommended.
PHP register_globals and safe_mode should be set to “Off”.
Use an FTP Client to make sure WP has the proper permissions for the folders.
https://codex.www.ads-software.com/Changing_File_Permissions
Some wordpress installs run out of available memory because it is set
too low in PHP. Your wordpress could be requiring more memory than PHP has allowed. Try one of these methods for increasing the amount of memory a PHP script may consume (most people just do #3)
1. If you have access to your PHP.ini file, change the line in PHP.ini
If your line shows 32M or less, try increasing it:
memory_limit = 64M;
2. If you don’t have access to PHP.ini try adding this to an .htaccess file:
php_value memory_limit 64M
3. Try adding this line to your wp-config.php file:
Increasing memory allocated to PHP
define('WP_MEMORY_LIMIT', '64M');
4. Talk to your host about their recommended solution.