kahi

@mfields, I have absolutely no problem with reading term-id from $wp_query – I wanted to show (and with help of get_option() I did) images inside own cycle of categories (got by get_categories() which does not modify $wp_query), so I had to seek for other way than do_action().

Basically, instead of:

<?php
$cat_to_att = get_option('taxonomy_image_plugin');
$cats = get_categories(array(...));
foreach ($cats as $c) { ?>

	<a href="<?php echo get_category_link($c->term_id) ?>">
		<?php if ($cat_to_att[$g->term_id]) echo wp_get_attachment_image($cat_to_att[$g->term_id], 'thumbnail'); ?>
    </a>
<?php
} ?>

There would be nice possibility of:

<?php
$cats = get_categories(array(...));
foreach ($cats as $c) { ?>

	<a href="<?php echo get_category_link($c->term_id) ?>">
		<?php if (YourPlugin::CatToAtt($c->term_id)) echo wp_get_attachment_image(YourPlugin::CatToAtt($c->term_id), 'thumbnail'); ?>
    </a>
<?php
} ?>

Sorry for the verbose explanation, it probably wasn’t necessary.

@samboll: If you mean http://wordpress.org/support/rss/forum/10 then… I don’t think this is viable… 🙁

Thanks moshu, switching to wiki-skin solved my problems.