Multiple public user upload problem

Hi,

Thanks for making this great plugin

I’m allowing my users to upload their drawings to my site at http://www.thewednesdaydrawingshow.com/uploadyourdrawings/

Many people click two or three times while waiting for something to happen, and I get multiple copies uploaded. done it myself by mistake too! Is there a way to disable the upload button until the upload has finished and the thumbnail has appeared? that would be great.

thanks for all the hard work

Shoo Rayner

http://ww.wp.xz.cn/extend/plugins/nextgen-public-uploader/