Character storing is still very much in beta, so you might want to hold off using it unless you want to help bug test. I've tested it with up to 20 custom characters, but there does seem to be some bugginess around saving large amounts of data (large relative to plain text), so it could break if you save lots of characters. I haven't seen any problems since I added some workarounds, but even if something does happen the worst case scenario is you lose your settings.
Apart from that, there are some minor bug fixes, and I've fixed the shaking problem with their feet as much as possible.
*edit* Fixed swallowing bug.
Just go to the modding tab once you've set your character up and press Save Character...
All you have to do is choose a name in the window that appears and press Save Character again. You can ignore the boxes to the right.
Storing characters with imports:
If you're saving a character with imported elements, the game has access to the file name but not the path, so to try and find the file automatically, it will check in the same folder as the .swf file, and in the "default" folder. I would recommend either keeping your files in the same folder as the game, or in another folder inside that one, so that you can just use relative file paths.
For example, if you have all of your hair imports in a "hairs" folder in the same folder as the game, then you can set your default hair folder to hairs/ and the automatic file finding should work.
If the game can't find your files in either folder, you'll have to give it the file path manually. In Windows, absolute file paths should look like C:\users\USERNAME\ and on Macs they should look like /HARDDRIVE/users/USERNAME/ (Let me know if I've got this wrong). It's easier if you have them somewhere near the game so that you can just use relative paths though. Press enter or click the little recheck button next to the file path to test it.
The game won't let you save the character unless it has the correct paths for the imports.
Backing up stored characters:
You can save and load a backup file for your custom characters from the modding tab. This file stores the character set ups and their thumbnails, but it doesn't copy the actual imported files, so it won't work if you give it to someone else. It's only really meant for backing up your characters and moving them to new versions as they're released. If you leave the "Overwrite" box unchecked, any backups you load will be added to the custom characters you already have.
Editing stored characters:
You can click the pencil button on a custom character to change their name or delete the character. This window will also open if you move an import file that the character needs, so that you can update the file paths.
I think that's everything. I'll try to fix any major bugs this week as they come up, so check back here for updated releases if you do find something.
I'll be taking a break next weekend, so there won't be a weekend update, but I'll post a new Future Features page soon.
(P.S. Any Actionscript experts out there: The problem I've been having saving the thumbnails is that storing ByteArrays in a SharedObject seems to mean it takes a while to read in, and accessing the data before it is finished makes Flash stop loading the rest. I can't find a way to test whether the SharedObject has finished loading without accessing the data, and the only workaround I've found online is to just add a half second delay before doing anything. Any suggestions for a more robust method would be appreciated.)