Thank you vanerven - that solved my problem as well! I had imported my posts from blogger, and they have <div> tags that were automatically added from the original blog. After removing the offending tag on that particular post, the sidebar found its way home. I had assumed it was Delicate specific as the Twenty Eleven theme did not have the display problem.
Good find, and I appreciate your help!
For anyone else having this issue - here is the text that vanerven found that helped:
If your sidebar has mysteriously relocated to the bottom of your front page this most likely means that there is some extra HTML code in one of your posts breaking the layout.
This extra code is normally added when any content is pasted from another web page, source, or program. The most common culprits are Microsoft Word and Open Office, which will both add extra HTML tags to any pasted content. Here is an efficient way to diagnose for the issue:
Go to Settings -> Reading in your blog’s dashboard and temporarily change the Blog pages: show at most option to 1.
Visit the front page of your blog.
Use the next/previous links (at the bottom of the pages) to navigate backwards through your posts. If every post has the sidebar issue, this most likely means that it is caused by something in your sidebar (any text widgets you may be using which include HTML code). If only some posts suffer from the problem, it is most likely caused by the content in those particular posts.
Once you narrow it down to a post, go to Posts -> All Posts and click on the post you want to edit. Click on the Text tab of your editing window and look for any extra HTML tags. The most common tags known to cause the problem are <div> tags:
Remove all <div> tags from the post content.