RE: "How do you check an MD5 sum?"
See the part about checking the md5 sum in the description above. (About 5 paragraphs down.)
-Max

wmblewett: Fixed a minor bug. Try re-installing, and visiting that site again.

ahoier: I'm guessing that autoIT script is running BEFORE greasemonkey scripts, otherwise, it'd put the altered mailto script in the address bar. If you can have that script run AFTER Mailto 2 Webmail, then it would probably work. Also, I visited that link you posted, and from the looks of the screenshot, you may be able to have that script go to gmail instead of outlook?

ahoier: I'm not sure what you're talking about. Maybe be a little bit more specific? Feel free to shoot me an email, describing what it is you're trying to do.

adam15c: There were some problems with the new Yahoo beta (and I think Hotmail, too). These use a lot of ajax and obfuscation, and I haven't had time to track down how to get to their new message composers.

jseppe: The script was designed primarily to open an email link the exact same way Outlook (or another pop3 client) would. Since Craigslist doesn't put the url or content of the ad in the mailto link, it does not put this information into the email composer (either pop3 or webmail). If you send me an email, I may modify the script for you, and maybe post it on userscripts under a different name.

Minor update: compatible with gmail again.

So, for those of you wondering, there is a bug in the current downloadable version of this script, that I haven't had time to fix yet. Basically, what happens, is that when you upgrade to this version, you will get a message saying that you don't have the current version, when, in fact, you do. All you have to do is click the box, to ignore it forever. (Until, possibly a new version comes out.)
I might not fix this bug until the next version. However, if people email me, expressing an interest in a fix sooner than that, then I will take a look at it.
Regards,
Max max(AT)efoxdesigns(DOT)com

More description?

Strange, I just tested it on XP SP2 and FF 2.0.0.6, and it worked fine. Do you have another plugin, script, or application forcing all documents that should open in new windows, to open in the same window?
Anybody else had this problem?
-Max

(You may want to take a look at Mailto 2 Webmail.)

kashman: Thanks for the info.
Springy9: Probably a problem with your Firefox or Greasemonkey installation.

Yes, and they do. Screen Userscripts works on other sites besides us.org, such as this script's homepage
Also, in the future, Screen Userscripts will hopefully be able to screen against other malicious scripts.
-Max

(By the way, Gasoline, even though the scan button does not appear on the description pages, they are still being scanned. It's just automatic.)

Yeah, that's one of the features you can configure. Just set threshold to 0, OR set autoScan to false, if you want it to ask on the description page. threshold is the number of script links on a page that Screen Userscripts will automatically scan. If the number of userscript links on a page is higher than threshold, Screen Userscripts won't auto-scan any, but will show the scan button instead. If you set autoScan to false, Screen Userscripts will never automatically scan userscripts, but will display the scan button instead. (Please see the [Update] notes in the description for release information.)
Regards,
-Max

All 'problems' thus far (I'm talking about those in the comments below) have been fixed.
autoScan and threshold options have been added. Enjoy!

Done. You now have the option to automatically scan, or be asked. (Another update is coming soon.)

Good clean script.
Silly of them to simply Rot13 the responses...

Heh. Great idea. Should definitely work off of an RSS feed though. Cool!

Strange. What email client are you using? Shoot an email to maxATefoxdesignsDOTcom, with a copy of the script you have running (both it, and greasemonkey are enabled, right), and let me know your email client (yahoo, gmail).