When attempting to save changes made the "About Me" section of my Stack Overflow profile while using an iPad, I encountered this error:

Oops! There was a problem updating your profile:

• unusual error updating your profile - please try again!

I was able to edit and save my profile a few moments later on my desktop without a problem. I tried once more with the iPad with the same error coming up.

My updated profile includes HTML and is maybe 300 or so characters in length. When I attempted to save my profile a second time after having changed it on my desktop, I simply clicked Save Profile without making any changes.