My wife got caught using an alternitive OS

[jakesdad]

Hi Carol,
Your Facebook password was changed on Tuesday, January 22, 2013 at 4:19pm (UTC-08).
Operating system:    Linux
Browser:    Firefox
IP address:    71.xxx.xxx.xxx
Estimated location:    Kansas City, MO, US
If this was you, you can safely disregard this email.

[µT6]

did she got such email?

i have done it in the past ad didn't got a email like that 

[Lone Stranger]

I have gotten an e-mail after I changed my Facebook password but it would give a link to undo it in case someone else hacked my account.  I have also gotten a couple of e-mails like that after a couple of failed attempts to change my password.  Someone else did try but I went into Facebook and made sure no other computers were logged into my account which put a stop to that.

[Texstar]

Hi Carol,
Your Facebook password was changed on Tuesday, January 22, 2013 at 4:19pm (UTC-08).
Operating system:    Linux
Browser:    Firefox
IP address:    71.xxx.xxx.xxx
Estimated location:    Kansas City, MO, US
If this was you, you can safely disregard this email.