validAliasCharacters field will be inserted in a "random" section

[fritzmg]

In the tl_page.php you are using

$GLOBALS['TL_DCA']['tl_page']['palettes']['root'] = str_replace(';{sitemap_legend', ',validAliasCharacters;{sitemap_legend', $GLOBALS['TL_DCA']['tl_page']['palettes']['root']);

This means the validAliasCharacters field will be inserted into whatever section comes before the sitemap_legend section. You are probably intending to insert the field into the Global settings section - however, if an extension happens to insert another section after that section, the validAliasCharacters field will end up being in that section instead.

For instance, if you have the news_categories extension installed, the validAliasCharacters field will be part of the News categories settings section of the palette.

[fritzmg]

Hm, I think you forgot a use statement.

[ausi]

Fixed in version 1.0.3