Oddity occurred in our forum

[hkwibawa]

Dear all

There are oddities in our forum.
after we studied the cause is some characters make us into a strange forum.
Some oddities as follows:
1. When storing new posts will appear an error message such as "Invalid Data" or "You are not authorized to create this post" ... etc
2. Edit posts only show the message "Working" in the absence of any process

character causes of error:
1. "
2. -

Please, help to resolve this problem

warm regards,