Using image_captcha with no troubles until testing the site on different computers. On Windows versions greater than XP, Transparent PNG image for Captcha comes out broken. I saw a post relating to corrupted bytes on a PNG and it looks like this could be the case here. I did not investigate any further than verifying that all browsers on (say Windows 7) complain that the transparent PNG image is corrupted.

In my cased I switched to JPG and now it works everywhere tested. JPG is fine for me but you might want to fix the outputting of PNG images.

Comments

soxofaan’s picture

soxofaan commented

Can you provide a link to the post you are referring to? Can you also try to download a PNG generated by the CAPTCHA module and post it here?

elachlan’s picture

elachlan commented
Status: Active » Postponed (maintainer needs more info)

We need more information to fix this issue.

chris matthews’s picture

chris matthews commented
Issue summary: View changes
Status: Postponed (maintainer needs more info) » Closed (cannot reproduce)

I'm closing this 5 year old issue as cannot reproduce.