Sounds pretty interesting. I'll think about it

OK guys, this is much like the "Oh no, more challenges!" thread but using custom levels, I.E.:  "A" posts Custom level and rules for solving it, then someone solves the level (a replay would be nice, but if you don't use Lemmix, you can post a spoiler with a written solution too), then "A" tells whether the solution is valid. If it is, the solver posts his/her challenge. If it is not, then the challenge remains.

RULES:

- The challenger chooses the rules for the solution of his/her level (for example, "no glitches").

- When someone posts a solution for a level, the level's author must validate the solution within 48 hours. If he doesn't, then the one that posted the first solution must continue with his/her own challenge.

- When someone wins a challenge (I.E.: when he/she posts a valid solution), he/she's got 48 hours to post a new challenge. If he/she doesn't, it's open floor for anyone else to post his own.

I guess that's it

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Well, I'll begin this challenge thread with a rather simple level.

RULES FOR THIS CHALLENGE:
- No glitches allowed.
- You can use either DOS or OHNO mechanics, it doesn't affect the solution.

OK, let's play!

I'm a happy MediaFire user No waiting times, unlimited capacity and amount of downloads/uploads, relatively high per-file size limit (100 MB), pretty decent download servers for being a free service, etc.

Never tried fileden.com though, so it might be better.

I've always used ImageShack (though the address isn't nice-looking at all). You could try Tinypic and Photobucket.

Wow, good one 

I'll give'em a try when I have time

I remember I had a lot of problems with "There's madness in the method". As for original Lemmings I don't recall since I was 8 when I played it