Error with my tease - cant edit

[Shattered]

Whenever I try to edit pages in my tease, It shows

"There was an error while uploading the image. Please make sure that you upload a valid JPEG image that is smaller than 5 MB."

I'm using one of the pre-determined image packs where I just select one so I'm not sure what needs to be changed. I click submit and it refuses to let me make an edit. I need to edit the rules on my first page or the tease and really usable :S

I had the same issue on another slide, but I could just delete it and make it again. However I cant do that for the first page as I dont know how I would add another to the front... Thanks for the help!

EDIT:
I just c@p into a new tease and that solved the issue, but I'll leave this here for maybe to be looked in too

[Slutastic]

its a fault with the script that has been mentioned a few times in the forums before.
I would try uploading a pic for that page - so you can edit it (rather than the use the "pre-determined image packs"

Either that or wait until admin has fixed it