When I paste anything on Gmail these two little squares will show up:

enter image description here

Looks like two characters, I can cut them as I can do with any text, but when I paste there's nothing to paste. Any idea what this is?

By the way, I use Boomerang for Gmail, not sure if it's related.


It shows up always in the end of the mail, after the signature, even if I paste something in the beginning of the text.

  • That's odd. Do you see them when you paste anywhere else?
    – ale
    Dec 21, 2013 at 15:17
  • @Krampus not, only on GMail. Dec 21, 2013 at 18:49
  • I don't have enough reputation to comment, but I remember having a similar issue about a year ago. I'm curious, does it happen to you only when using a specific browser? Dec 22, 2013 at 15:40
  • 1
    @Imray looks like it's only on Firefox... Not happen on Chrome. Dec 23, 2013 at 14:06
  • 1
    My guess is they should be unicode characters something like end-of-line and such..
    – Aditya
    Dec 25, 2013 at 9:24

5 Answers 5


It was indeed an issue with Boomerang on Firefox.

Thanks to Michael Hoffman for letting us know about the issue. We released a fix for this last week. If you are still seeing this, make sure you have the latest version and reload Gmail after clearing cache.


Try cutting the 2 dots and pasting them into the online hex editor at http://www.edithex.com/ and then click the Convert button.

Then copy and paste the results here.

I’m guessing the 2 dots are control characters, such as EOL, or EOF but we should be able to work out what they represent, when you paste the hex codes for the characters here.

  • I have this problem too. I pasted an X on either side of the two little squares. When I paste into edithex.com, I get only XX (58 58). The squares are missing. Jan 4, 2014 at 20:22
  • I can cut, but there's nothing when I paste... Jan 6, 2014 at 11:46

I remember something like this when I was using Boomerang for Gmail in the Chrome Browser but I can't remember the details. I agree, might be control characters.

What happens when you try this on a computer without Boomerang installed?

Trying it without Boomerang might eliminate that as a culprit.

Other things to check:

  • Is the latest version of Boomerang installed?
  • Are there other extensions or plugins installed that might be conflicting?

I no longer use Boomerang or I would test it again.

  • 1
    I had this problem too on Firefox. Just disabled Boomerang and the problem went away. Jan 4, 2014 at 20:24
  • Still not sure what's the meaning of those dots/squares, but it really looks like Boomerang's stuff anyway. Jan 6, 2014 at 11:47
  • Baydin, the makers of Boomerang, say they are looking into it. twitter.com/baydin/status/419644359970013187 Jan 6, 2014 at 14:28
  • Baydin posted an answer here to follow-up.
    – ale
    Jan 14, 2014 at 1:18
  • Glad to hear this is now fixed. Boomerang is a great tool for that missing "manage this email later" feature. More useful than you might first guess. Jan 14, 2014 at 19:38

Check out the signature text of your account in Settings.

Also check in "Labs" tab of settings if you have enabled any unnecessary apps.


Looks like it's an attempt to attach an image to your email body


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