Moving from Windows to Linux

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Hi!

Yesterday I moved my board from a Windows server to a Linux Apache.
I copied the database and files. Board is already working but I'm having some problems with some messages. Attachement are shown but not the text. The text is the messages-table. It is a formatted message. Maybe a PHP extension has to be configured or something is missing?
On the Windows Server it is shown correctly.
Using MySql 5.7, PHP 5.6 and SMF 2.0.12.

Any suggestions?

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Solved!
http://www.simplemachines.org/community/index.php?topic=550444.0