This Drives Me Crazy

If your Tumblr theme has a border at the top, please give the controls some extra room:
iframe#tumblr_controls {
top: 7px !important;
}

Phew!
Liked items are for advertisers, they’re not for you. In Facebook’s estimation, you don’t need to remove a page you no longer like, because you are never going to visit it anyway.
Jeffrey Zeldman: Managing Facebook Like. Or not.
I stripped my profile to the bone and still cringe when I have to wade into the steaming pile that is The Internet™ to most of my peers. Took me 20 minutes to find out how to remove applications, which can do a lot more than rot in a ghetto full of ads.

If your Tumblr theme has a border at the top, please give the controls some extra room:
iframe#tumblr_controls {
top: 7px !important;
}

Phew!
Justin Williams piles on the hate for UITabBar:
Rather than taking the easy way and slapping a tab bar at the bottom of your UI, put the extra effort into the design process to see if it is possible to do the application using a single navigation stack.
I’d go as far as to say that if your app involves any significant scrolling at all, you shouldn’t be using one.
If you use Tumblr on an iPad, an out-of-the-box Macbook Air or have followed Steven Frank and John Gruber by disabling Flash altogether, you’ve probably noticed the dashboard’s a little rough around the edges when it comes to graceful degradation.
As an example (that’s easy to fix), photosets aren’t displayed at all. On Tumblr-powered sites, theme variables (e.g. {Photoset-500}) generate a block of images as fallback which gets replaced by a slideshow player if Flash is installed. For some reason the dashboard doesn’t work this way—all the fallback you get is a message saying Flash is missing. That sucks, so I hammered out a bookmarklet patch.
Drag this link to your bookmarks bar, sync it to your iOS device* and tap it to replace that annoying message:
Next: a Safari extension so you won’t even have to click, and fancy -webkit-transitions—learning is fun!
* As Marco Arment notes, this is still a complete pain in the ass on iOS devices.