.tc-tiddler-info {
<<box-shadow "inset 0px 0px 0px rgba(0,0,0,0.1)">>
}
Oh, I should have added: I've tried using the "seamless" theme, but that still leaves a small border (and, besides, I'm hoping to use the "heavier" theme...).
.tc-tiddler-info {
border: none;
box-shadow: none;
}