When editing news you get

APPLICATION ERROR 0000026

Data Type mismatch. Enable detailed error messages for further information.

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Full path: /var/www/mantisbt/core/helper_api.php

Line: 189

Variable    Value   Type

p_var1  1   string

p_var2  1   integer

p_strict    1   boolean

Filename    Line            Function    Args

/var/www/mantisbt/core/helper_api.php   189 -   -   trigger_error   ( <string>'26', <integer>256 )

/var/www/mantisbt/core/helper_api.php   238 -   -   helper_check_variables_equal    ( <string>'1', <integer>1, <boolean>true )

/var/www/mantisbt/news_edit_page.php    126 -   -   check_checked   ( <string>'1', <integer>1 )