Random (white and grey) Pixels appear in artwork when testing the game

Hello Stencylers, I've just downloaded Stencyl and started to have a play. (looks promising) A strange thing happens with my artwork when I test the game on my desktop. White pixels appear across my greyscale background (its a pencil drawing) I also imported a gif/actor and some parts of the body look like its been deleted with the magic wand tool in  PS.

Other Details :
BG is 1024 px wide
it's a jpg and RGB
It's 72 DPI

Any suggestions?

Thanks,

J

Hey and welcome to Stencyl!
Can you post us some screenshots? =)

Hello Indie Station, thanks! I may have cracked it. I saved the file as 300 DPI and avoided 'save for web' from PS. I

Saving for web is indeed the issue haha. You should always just use the regular png file extension.

Using 300 dpi and 72 dpi don't actually affect anything , unless its for printing.
Like TheIndieStation said, use png format its lossless, its better.
Jpg is a lossy compression, will always have artefact. Save for web might have make it even worst.