Upload image – array?

Hi,

First off all, congrats for this great plugin!

I do not know from which update, the custom field of the image upload field:

When sending 4 photos:
I used to create 4 custom_fields each with a different ID

Now it presents in an array the IDs of the photos:
a:5:{i:0;s:5:”10598″;i:1;s:5:”10599″;i:2;s:5:”10600″;i:3;s:5:”10601″;i:4;s:5:”10602″;}

Is this a change to the plugin (I could not understand when) or something is wrong / conflict?

Thank you