Hi, I'm finishing a new plugin - Shutter Reloaded (yes, it started from the original Shutter by Andrew Sutherland). The scripts are only 5.7KB in size and it doesn't use external js libraries.
I've tested it on all computers I could find, but still need more tests especially on IE-Mac (does someone still use that?) and Safari.
Have a look at http://www.laptoptips.ca/projects/wp-shutter-reloaded/ and drop me a line if it doesn't look right :) and if your browser reports js errors, include them too plz.
Of course it would be best if you could try the plugin and tell me what you think.