tumblr: doesn't download _1280.jpg from _500.jpg url automatically
I notice that most blogs post _500.jpg or png version of images, but copying the url and changing it in the browser to _1280.jpg will return a larger resolution if available, and if not, then it will return the 500p resolution version (using the _1280 url, it still works)
Not really an issue, but how about setting the ripper to automatically convert the image url to the highest resolution (1280 for jpg and png)? then downloading using that url will get the largest resolution available.
Could be considered as a possible workaround, yes, because the _1280 URL should always work.
I've noticed this as well, but I think this issue is only limited to tumblrs displayed in the browser, because you can use custom blog themes etc. pp., i.e. custom HTML/CSS/JS.
AFAIK, the API should always return correct URLs.