Um not sure, but I don’t think that’s likely. I’ve had other cards validated without a problem and I haven’t touched anything to do with robots.txt. I’m on Wordpress and the option to discourage search engines is turned off.
Also - validating other types of cards works - for example this one http://www.welljudged.com/view-image/?imid=1005. I know it’s already been validated - so maybe that bypasses the issue, but I did get it validated in the first place ok…
Any other suggestions?