I am finding the twitter cards experience to be frustrating, at best.
Sometimes it works - do the same thing again - it doesn’t. The validation tool is decidedly flakey, with inconsistent results.
I have setup a number of my sites’ pages with no problems - then doing exactly the same thing the validation fails with errors like ‘invalid card type’. I know this is rubbish because I’ve setup the same card for another page with no problems.
Am I alone with this or, can anyone come up with a workable suggestion?