Submit Error with use of swedish characters after PHPupgrade

[Vaios]

Script URL: http://www.hagalunden.se/felanmalan/
Version of script: 2.3
Hosting company: http://www.citynetwork.se
URL of phpinfo.php: http://www.hagalunden.se/felanmalan/phpinfo.php
URL of session_test.php: http://www.hagalunden.se/felanmalan/session_test.php
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Write your message below:

We have a problem after our hosting company upgraded PHP from 5.3.10 to 5.5.7. The problem is that if we use swedish characters such as å,ä and ö, we get an error message when trying to submit the ticket:

Error: Please correct the following errors:

Please enter your name
Please enter your ticket subject
Please enter your message

There is no problem submitting tickets if we don't use swedish characters and again this error started after the PHP upgrade.

I'd appreciate any help. Thank you!

[Klemen]

This is actually due to a BUG in PHP 5.4+ and PHP 5.5+ (the PHP development teams calls this a feature, but it is actually a very annoying bug they do not wish to fix).

Anyway, you will need to upgrade your HESK to the latest version to make it work normally with PHP 5.5+

[Vaios]

Thank you!