Hello, I am having the same problem as many posts describe regarding thumbnails not showing.  I have yet to find the solution in any of the similar posts. My gallery page shows the image boxes (li.sig-block),  but the images themselves are not showing as thumbnails. The pop-up function works fine.
I had the same problem with simpleimagegallery, so decided to upgrade to Pro, in the hope this might kick start everything to work properly.
I have read many posts, changed permissions etc. etc. and I have also tried the gallery in an assigned template without other modules etc. in case there was a conflict, but nothing is working for me. Incidentally, I have also tried Sigplus, which I believe is similar to SIG, and have the same problem, although CSS Gallery works fine.  Also this plugin works fine on another site, same host.  So what could the problem be?

Please help!

Thank you

After hours of contemplation, I have finally solved this!
The problem was with the .htaccess file in the root folder, which I replaced with the same file from the Joomla! installation files, with success :)  I don't fully understand the .htaccess file, but I could see (by using firebug) that the thumbnails weren't being accessed, but that the pop ups were.

I hope this helps other users with the same problem.

Hi all

After much headache over this I found a solution. It was indeed the .htaccess file causing the problem in my case. I have dedicated Joomla hosting which overwrites the default .htaccess file with it's own when using the hosting company's own Joomla site build facility.

In the .htaccess file I found this

## Disallow front-end access for certain Joomla! system directories
RewriteRule ^(includes/js/.*)$ - [L]
RewriteRule ^(cache|includes|language|logs|tmp|libraries/joomla|libraries/phpmailer|libraries/phputf8|libraries/simplepie)/.*$ index.php [F,L]

and deleted the "cache|" bit then the thumbnails displayed.

Hope this helps others with the same problem.

I had this problem with Sigplus when I moved to j2.5.6.  Bought Simple Gallery Pro thinking this would resolve the issue and would get support if needed.  Well, this did not work either.  So I started to look on this Forum and came across your post. All I can say is you are a genius.  Had an incline it might have something to do with the .htaccess file but no expert. I am back up and running - great advise and solution.  THANK YOU

Hi,

I have the same problem with the thumbnails, which are not shown when I use the plugin in an article. I am working with joomla version 2.5 now and had a look at the htaccess file. I was surprised to see that the above mentioned rewriterule is not in my htaccess file?? Can you explain that to me? I am trying to find an answer for quit a while now.


Thanks
Bas

## Disallow front-end access for certain Joomla! system directories
RewriteRule ^(includes/js/.*)$ - [L]
RewriteRule ^(cache|includes|language|logs|tmp|libraries/joomla|libraries/phpmailer|libraries/phputf8|libraries/simplepie)/.*$ index.php [F,L]

and deleted the "cache|" bit then the thumbnails displayed.

Hi,

This was exactly the same for me so I have deleted the "cache|" bit HOWEVER this was obviously done for a reason, so is my site (our sites) appreciably more vulnerable to attack now?

Andy

SIG PRO code is pretty straight forward and simple and does not involve .htaccess file handling in any way.

Dear Katia,
Can you explain to me why I can see thumbnails when I use the plugin in a k2 items image gallery and why I cannot see the thumbnails when I copy de plugin link in a original joomla article. I set all the rights to writable, so that should be no problem.

Regards,
Bas

What do you mean by "copy the plugin link in an original joomla article"?
If you want to use SIG PRO in a joomla! article you should use the tags"
{gallery}the path of your image folder in your Media Manager{/gallery}

Yes, that's what I mean, I try to display the photos by using the tag.

Pm me access to your backend as super admin please so as to check out your issue.

This is a script conflict with JA thumbnail plugin you use in the same page. Once you disable this plugin, SIG Pro thumbnails display just fine!

You are great, thanks, how should I have found this ? Or is this just something one should know? Maybe it helps me solve problems in the future if I know how you found this.

Regards,
Bas

I have disabled some plugins -one by one- in order to find which one causes the conflict with SIG pro. Simple as that!