Error: Unknown modifier '$' in main_product_image.php

I'm getting this in my error log. Any ideas? I'm using Image Handle 3, but the error occurs whether or not Image Handler is active.

PHP Warning: preg_replace(): Unknown modifier '$' in /includes/modules/4a/main_product_image.php on line 22

There is no folder /includes/modules/4a/ in the standard distribution

I am guessing /A4/ is the name of the template override folder

kobra, "4a" is probably the custom template override foldername.

divinelightning, What's the image filename involved when the error is triggered?

4a is my active template. I don't know the file, but it is triggered very frequently. Not with every page view, but maybe 1/10 page views.

Lemme say it another way: do any of your images have a $ in their filename? If so, remove it.

Unable to find images with '$'. This is the line the error refers to

$products_image_base = preg_replace('/'.$products_image_extension . '$/', '', $products_image);

replaced with

$products_image_base = preg_replace('/'.$products_image_extension . '/', '', $products_image);

which did not work because then I got the error

[26-Sep-2012 19:24:37 UTC] PHP Warning:  preg_replace(): Unknown modifier '/' in /home/divine/domains/divinelighting.com/public_html/includes/modules/4a/main_product_image.php on line 22

I'm using Image Handle 3
There is no custom template file in IH3 for main_product_image.php but you have a custom version at /includes/modules/4a/main_product_image.php

What is this from??
Have you tried deleting it?

IH3 download has "Required Core Edits/includes/modules/YOUR_TEMPLATE/main_product_image.php"

Okay, back WAY UP and start at the VERY BASICS.
Do ANY of your image filenames have ANYTHING OTHER THAN letters and numbers, and a single "dot" in them? If so, change them.

There are thousands of pictures. I've glanced through them and seen the following characters:
~._ space#-
Which of these aren't allowable?

divinelighting:

There are thousands of pictures. I've glanced through them and seen the following characters:
~._ space#-
Which of these aren't allowable?

The 'safe' characters are the underscore and minus. All of the others you list should be avoided (yes, even the [space]).

Cheers
Rod

You're using Image Handler, and the documentation for Image Handler discusses acceptable characters.
So does the Zen Cart FAQ on images: http://www.zen-cart.com/content.php?100-how-do-i-add-multiple-images-to-a-product ... see the big text near the end of the article.