[Plugin: WPTouch] Throwing Deprecated Errors

We just installed WPTouch from within the WordPress Administrative Panel and it seems to be throwing all sorts of deprecated errors. This happens within the Admin CP and when viewing the website via a mobile phone.

On activation, we see the following:

Notice: unserialize() [function.unserialize]: Error at offset 2 of 1239 bytes in /home/user/public_html/wp-content/plugins/wptouch/wptouch.php on line 629

Notice: unserialize() [function.unserialize]: Error at offset 2 of 1239 bytes in /home/user/public_html/wp-content/plugins/wptouch/wptouch.php on line 629

Notice: unserialize() [function.unserialize]: Error at offset 2 of 1239 bytes in /home/user/public_html/wp-content/plugins/wptouch/wptouch.php on line 629

Notice: Use of undefined constant bnc_wp_touch_page - assumed 'bnc_wp_touch_page' in /home/user/public_html/wp-content/plugins/wptouch/wptouch.php on line 596

Notice: has_cap was called with an argument that is deprecated since version 2.0! Usage of user levels by plugins and themes is deprecated. Use roles and capabilities instead. in /home/user/public_html/wp-includes/functions.php on line 3321

Warning: Cannot modify header information - headers already sent by (output started at /home/user/public_html/wp-content/plugins/wptouch/wptouch.php:629) in /home/ipe/public_html/wp-includes/functions.php on line 830

Warning: Cannot modify header information - headers already sent by (output started at /home/user/public_html/wp-content/plugins/wptouch/wptouch.php:629) in /home/ipe/public_html/wp-includes/functions.php on line 831

There are even more errors when viewing the mobile theme via an iPhone, which most likely relate to the above.

The plug-in states that it’s compatible with WordPress versions up to 3.0 but that really isn’t the case here. Any ideas?