I noticed this issue crop up on a site I updated recently. I suspect this is a case sensitivity issue as some MySQL configurations are not set up to allow a mix of uppercase and lowercase table names, usually Windows servers.
The site in question that I updated was looking for ‘wp_pluginSL_shorturl’, but the actual table was named ‘wp_pluginsl_shorturl’.
The option ‘lower_case_table_names’ in my.cnf lets you control this. Check out https://dev.mysql.com/doc/refman/5.0/en/server-system-variables.html#sysvar_lower_case_table_names for more info.
