My client sells flowers pots. Since a given pot style comes in many different sizes, they needed to have inch marks in their attribute option values.

Sample Attribute Name: Pot Size
Sample option value might be: 6" dia. X 3 5/8" deep


Zen cart doesn't seem to have an issue with creating or working with an attribute option value like this ...except when you go to edit it later. The inch marks are not being encoded properly on the form display causing the html to break and anything after the first inch mark gets truncated in the value text box.

However, it appears that this can be easily fixed by finding, around line 727 (for v1.3.8), in admin/options_values_manager.php the following:
Code:
$inputs .= $languages[$i]['code'] . ':&nbsp;<input type="text" name="value_name[' . $languages[$i]['id'] . ']" ' . zen_set_field_length(TABLE_PRODUCTS_OPTIONS_VALUES, 'products_options_values_name', 25) . ' value="' . $value_name->fields['products_options_values_name'] . '">&nbsp;<br />';
and changing to:
Code:
$inputs .= $languages[$i]['code'] . ':&nbsp;<input type="text" name="value_name[' . $languages[$i]['id'] . ']" ' . zen_set_field_length(TABLE_PRODUCTS_OPTIONS_VALUES, 'products_options_values_name', 25) . ' value="' . htmlspecialchars($value_name->fields['products_options_values_name']) . '">&nbsp;<br />';
Be sure to backup this file or save a copy as this file is in admin and there is no custom template file for these core files.