It's good that TiddlySpace supports uploading arbitrarily sized SiteIcon images. It would be better still if it preserved the aspect ratio when scaling them down. For example:
bag
jermolene_public
created
Thu, 23 Sep 2010 22:02:13 GMT
creator
jermolene
modified
Thu, 23 Sep 2010 22:05:15 GMT
modifier
jermolene