Actually, after even more digging, I found out that wasn't the problem at all really. Though it is related to fonts. Seems that the shorthand has no problems in Marketo. What the problem is, is using a custom font. Once I accidentally added a space in the @font-face style in the head tag, the thumbnails started working correctly! But, the font's no longer worked, the defaulted to their fallbacks. but when I removed that space, the fonts work correctly, but the thumbnails are all gone. So, I'm not sure if this is a Marketo limitation or maybe the @font-face style and or source is incorrect? ... View more

I FIGURED IT OUT!!  It took me all day but I finally figured out what was causing this! I combed through a number of working templates code and couldn’t find a thing “different” but I was focused on marketo specific things. Then finally I just figured I’d go line by line to see what was different between each module in just the html aspect. It was the font declaration. The developer used short-hand for weight, size, line-height and family. I converted that to long hand declarations and everything works! All thumbnails, and even the template thumbnail, are showing perfectly!  ... View more

Thanks Grace! I really appreciate your response. And sorry about the name! I added this question from my phone using the account that my client set up. Hadn't even realized that's the name they gave my account! 🙂 (I think I updated it now?) Anyway, since I wrote this this morning, I have duplicated the template and have been trying to add 1 module at a time. I add the first module, save it, make an email with that template and the thumbnail shows up. go back to the template, add in a second module, save it and make a new email and no thumbnails? not even the first one that was working when it was by itself? It seems that the more complex modules, even though they have the correct class and id applied, do not want to generate thumbnails? At first I thought maybe there was a conflict between the modules, like using the same id for example. But there isn't? The code validates fine.  I am able to add in the header module and the footer module and those generate thumbnails. but they're just image based. Seems like when I add in something that has a text field things start acting odd. Anyway, perhaps I do need to open a proper support ticket?   ... View more