How do I Stop Flash from Stretching Sprites When Moving

[That Deer]

So I've been trying to make a 200 x 200 avatar for a new animation forum I recently joined, but ironically, Flash is fucking it up.

Basically, I am trying to animate a character in their idle stance, but when I align all the pieces, I find that one of the frame's sprites is the tiniest pixel fatter than the previous. It seems moving the specific sprite (whether by dragging or nudging via keypad) causes it to stretch ever so slightly as it moves, disrupting its alignment with the others (possible due to the sprites having different dimensions). This happens with 2 out of the 5 sprite frames and it makes it look like utter shit because of it.

I made a gif of the of the occurrence to better visualize the problem:
[IMG]http://i1056.photobucket.com/albums/t377/Zeavan/Stuff/What-The-Fuck-Is-This-Shit_zps62843f2f.gif[/IMG]

Note: Onion Skinning is ON and shows there is no indications that they aren't aligned on their borders.

Please help, my OCD Blessed Brethren; this shit is driving me up the wall.

[naelstrof]

You probably shouldn't use Flash to animate an actual bitmap GIF, but afaik flash has options to convert the bitmap to various formats. I remember by default flash would convert bitmaps into some god-awful format that made them look like shit while rotating them.

[url]http://help.adobe.com/en_US/flash/cs/using/WSd60f23110762d6b883b18f10cb1fe1af6-7e9ca.html#WSd60f23110762d6b883b18f10cb1fe1af6-7e96a[/url]

Might want to play with the settings listed here for "smoothing" and "compression".

[That Deer]

I think you might be right. I think I skipped a step when working with this thing. I'll back back in a few minutes with results.

[GiGaBiTe]

If you have all of the frames of the animation, just use GIF Movie Gear. I think they still have a 30 day trial available and I don't remember it having any significant limitations.