I tired other conditional tags, and the result is, that all the other e.g. is_page(), is_single() work, just is_home() or is_front_page() don't.
In my index.php there is an insert, because I want just one category in home page:
Code:
<?php if ( is_home() AND !is_paged() ) {
query_posts('cat=3');
} ?>
If I cancel this code, widget logic works perfectly, but I can't filter the category...