I had a few problems upgrading to 1.1.0. I have PHP 5.4. The first server does not have mbstring extension. This caused fatal duplicate function defs, mb_strlen, etc. They exist in bootstrap.php, around line 374, and mbstring.php. I had to put a conditional (if(!function_exists('mb_strlen'))) around the 5 functions (listed in bootstrap.php) in mbstring.php to eradicate the fatal dup error.
The other server I use has PHP 5.4 but does have mbstring extension but no mb_regex_encoding(). It crashed until I did this (around line 83 in bootstrap.php):
if (extension_loaded('mbstring')) {
mb_internal_encoding(RCUBE_CHARSET);
if(function_exists("mb_regex_encoding"))
mb_regex_encoding(RCUBE_CHARSET);
}
Doug
Smartlab Software