Been trying to get my old site back to work after the host did a few php etc updates.  :'(

Tried everything that 's out there; 755 and 777 rights to many other things like removing numbers from folders. Think there is something else going on.

Only the thumbnails don't show, clicking the image opens without a problem.

Here are the error messages I received from the server. Hope this explains it better.

mod_fcgid: stderr: PHP Warning:  imagejpeg(): Filename cannot be empty in /home/SITE/public_html/mambots/content/plugin_jw_sig/showthumb.php on line 79, referer: http://...

Hope somebody is out there to help with this old stuff.

This is an error that has to do with FastCGI running through your server. You can advise your hosting company on this error.

Thank you for your reply!

What can I advise my host to do exactly?

Have you just tried to update the SIG Plugin to see if you still get this error?

The SIG runs on Joomla! 1.0.15 Stable. Haven't done a plug update, to what version am I able to update SIG without the need to update Joomla?

You have a very old Joomla! installation. You can't do the update of SIG to that version. It is not supported.

You can ask your hosting company to follow this post here: www.howtoforge.com/forums/showthread.php?t=50897
in order to solve the php warning issue in your error logs.