Wrote a little script that creates an image containing both VISA and MasterCard logos.
When one of the logos is clicked on, a new tab opens with only that logo visible
Interestingly, one of the logo filenames was "mastercard.png"
Everytime I tried to use that name, the script would fail and the file would be "404 not found".
The use of ANY other names for the file such as:
BUT NOT "mastercard.png"
Oh, and "VISA.png" worked fine too..
Is there any list of such forbidden file names that beginners like me should know about ?