Mysql Errors With A Mismatch

Our cs-cart site (version 2.1.1) has been running smoothly until this morning sometime.

We are getting the following errors. I have done nothing with the site. I have called the hosting provider (A2 hosting). They are looking into it. Is this something anyone has seen and can spread a little light on the problem?

Warning: mysqli::mysqli() [mysqli.mysqli]: Headers and client library minor version mismatch. Headers:50536 Library:50617 in /home/jdneedle/public_html/core/db/mysqli.php on line 44

Warning: session_start() [function.session-start]: Cannot send session cache limiter - headers already sent (output started at /home/jdneedle/public_html/core/db/mysqli.php:44) in /home/jdneedle/public_html/core/class.session.php on line 248

Warning: Cannot modify header information - headers already sent by (output started at /home/jdneedle/public_html/core/db/mysqli.php:44) in /home/jdneedle/public_html/core/fn.init.php on line 401

Thanks for any input,

David DeWitt

This would indeed seem like a hosting issue since cs-cart only utilizes the mysqli provided by PHP.