Looking through my server logs I found some 404s from CPG
The album shown has just those four pictures, cyl1.jpg through cyl4.jpg. The following appears in the log:
URL hits referrer
/album/cyl2.jpg 6 http://www.largiader.com/album/thumbnails.php
/album/cyl3.jpg 6 http://www.largiader.com/album/thumbnails.php
/album/cyl4.jpg 6 http://www.largiader.com/album/thumbnails.php
/album/cyl1.jpg 6 http://www.largiader.com/album/thumbnails.php
/images/h_powered-php.gif 2 http://www.largiader.com/album/thumbnails.php
/images/h_powered-mysql.gif 2 http://www.largiader.com/album/thumbnails.php
/images/button_bg_anim.gif 2 http://www.largiader.com/album/thumbnails.php
/images/h_valid-css.gif 2 http://www.largiader.com/album/thumbnails.php
/images/valid-xhtml10.gif 2 http://www.largiader.com/album/thumbnails.php
/images/powered-php.gif 2 http://www.largiader.com/album/thumbnails.php
/images/button_bg.gif 2 http://www.largiader.com/album/thumbnails.php
/images/powered-mysql.gif 2 http://www.largiader.com/album/thumbnails.php
/images/h_valid-xhtml10.gif 2 http://www.largiader.com/album/thumbnails.php
/images/valid-css.gif 2 http://www.largiader.com/album/thumbnails.php
Is this just a server hiccup? It looks like CPG generated calls to the wrong URL. BTW this represents about 24 hours. It's not happening every time.
CPG is installed in /album/ on my server, and those files were uploaded to the /album/albums/uploads/bike/ directory.
http://www.largiader.com/album/ is the installation
http://www.largiader.com/album/thumbnails.php?album=12 is the album where those four pictures are.
A good "rule of thumb" is if the 404 - 500 etc. errors are not repeatable then it is a server/hosting issue.
Try testing those pages repeatedly with a browser that you can easily clear the cache. If the errors are not repeatable, then ask your host for assistance.
It's not really a problem in that the album seems to work fine, but searching for 404 gave a few threads indicating that under certain conditions a path variable was not available, or something similar. That seems like a logical cause for me, since /album[some upload path]/cyl2.jpg and [some theme path]/images/button_bg.gif are valid paths.
BTW I am running 1.4.26. I upgraded from 1.4.25 ten days ago.
No additional entries were found so for the moment I conclude that it's not a problem within CPG. If I can duplicate the problem in the future I'll open a new thread.
It's beyond the scope of this board to help you with issues related to webserver setup. Examining a server's error log and figuring out why particular errors happen clearly falls into that category. Please ask your webhost for support if you have questions concerning the server's log.