Abalone

I had the same problem after updating the plugin and figured out that a javascript-file is missing, nivo-lightbox.min.js.
If you have access to your server:

1. Go to https://github.com/gilbitron/Nivo-Lightbox/blob/master/nivo-lightbox.min.js – copy the code and save it as nivo-lightbox.min.js.
2. Connect to your server (via ftp), go to the folder wp-content/plugins/responsive-lightbox-lite/assets/nivo-lightbox and place the nivo-lightbox.min.js in that directory.

After that everything worked fine for me again – hopefully that’s also the solution for you.

e: I just took a look at your source code, and yes, your nivo-lightbox.min.js is missing – just add it to the folder mentioned above and everything will be fine ??

Ok, sorry, I was code-blind this morning ?? It works now.
In case that someone else wants to know what I missed:
open style.css, search for all .archive-classes and add .search-classes.

Goodnight,
Abalone

Hm, yes, that’s what I thought too. But when I take a look at the output I don’t see any difference in code.

This is the output of archive.php:

<div id="content">
	<div class="hfeed">
		<div id="post-3275" class="hentry post publish post-4 odd author-xyz category-insekten-insecta category-kaefer-coleoptera category-laufkaefer-carabidae category-neu category-ruedesheim-weinberge">
		<a href="https://www.xyz.de/ruedesheim-weinberge/feld-sandlaufkaefer-cicindela-campestris-3" title="Feld-Sandlaufk?fer (Cicindela campestris)"><img src="https://www.xyz.de/wp-content/uploads/2013/01/7542995396_12145bef02_o-220x150.jpg" alt="Feld-Sandlaufk?fer (Cicindela campestris)" class="archive-thumbnail featured" width="220" height="150" /></a>
		<h2 class='post-title entry-title'><a href='https://www.ffh-rheingau.de/ruedesheim-weinberge/feld-sandlaufkaefer-cicindela-campestris-3'>Feld-Sandlaufk?fer (Cicindela campestris)</a></h2>
		</div><!-- .hentry -->
	</div><!-- .hfeed -->
</div><!-- #content -->

and this of search.php:

<div id="content">
	<div class="hfeed">
		<div id="post-3275" class="hentry post publish post-1 odd author-xyz category-insekten-insecta category-kaefer-coleoptera category-laufkaefer-carabidae category-neu category-ruedesheim-weinberge">
		<a href="https://www.xyz.de/ruedesheim-weinberge/feld-sandlaufkaefer-cicindela-campestris-3" title="Feld-Sandlaufk?fer (Cicindela campestris)"><img src="https://www.xyz.de/wp-content/uploads/2013/01/7542995396_12145bef02_o-220x150.jpg" alt="Feld-Sandlaufk?fer (Cicindela campestris)" class="archive-thumbnail featured" width="220" height="150" /></a>
		<h2 class='post-title entry-title'><a href='https://www.ffh-rheingau.de/ruedesheim-weinberge/feld-sandlaufkaefer-cicindela-campestris-3'>Feld-Sandlaufk?fer (Cicindela campestris)</a></h2>
		</div><!-- .hentry -->
	</div><!-- .hfeed -->
</div><!-- #content -->

No big difference, I don’t see what I could add/change in the stylesheet :-/

Bye
Marja