How do I rotate my profile picture?

I Don't even know if you can do that. xD

The site won't let me upload my pictures. ..someone please help. ..

its very easy
u can go into the account tag which is next to ur mingle logo at the very top of this site
and thn click edit photos
thn upload ur pics bfr that click on choose file option and thn select ur pic frm ur computer and click upload ...n enjoy

Sideways Pictures
You must pre-edit it.
I find that can happen when your pic is wider than it is tall.
You can pre-edit it at http://www.photobucket.com
which is FREE.

I personally use the FREE http://www.irfanview.com
which I uploaded to my pc, now every pic that pops up on my
pc comes with an 'edit' bar which includes a rotate option.

I understand you can also rotate it on a smartphone.
~~~
Picture Size:
Mark's quote on picture file size:
"When it comes to uploading images to a Mingle2 account, the actual file
size is almost unlimited. The number of pixels in the image, however,
is limited to 10 million. In other words, the product of width*length
must not exceed 10000000.

Pictures should be in .gif, .jpg, or .bmp format."
~~~
Otherwise, here are your links to edit photos:
Mobile:
http://m.mingle2.com/users/edit_photos
PC:
http://mingle2.com/user/edit_profile