I noticed running multiple update query.

14452 mysql-slow.log:UPDATE wp_options SET option_value = ‘O:29:\”WPtouchDefaultSettingsBNCID30\”:6:{s:5:\”bncid\”;s:0:\”\”;s:19:\”wptouch_license_key\”;s:0:\”\”;s:16:\”license_accepted\”;b:0;s:21:\”license_accepted_time\”;i:0;s:22:\”next_update_check_time\”;i:1387075624;s:8:\”failures\”;i:0;}’ WHERE option_ name = ‘wpts_bncid’;

More detail about the multiple queries.
https://gist.github.com/matsubo/8181358

I think following code produces the queries.

http://plugins.svn.ww.wp.xz.cn/wptouch/trunk/core/bncid.php

$bnc_settings->next_update_check_time = $now + WPTOUCH_API_CHECK_INTERVAL;
		$bnc_settings->save();

I hope this will be fixed next release.

http://ww.wp.xz.cn/plugins/wptouch/