You're welcome.
I knew first because sidebar at the bottom is always due to bad html somewhere (and clicking on each post title will tell you where), second because I viewed the sourcecode of that post afterwards to make sure.
To satisy your curiosity now, I visited a cached version of the post; your post was like that:
PARAGRAPH 1
TABLE 1
</div>
<div>
PARAGRAPH 2
PARAGRAPH 3
<div>
TABLE 2
</div>
<div>
PARAGRAPH 4
PARAGRAPH 5
PARAGRAPH 6
</div>
<div>CONCLUDING PHRASE</div>
<div><em>SIGNATURE</em></div>
<div>LINKS</div>
Notice the 6 stray div tags?
And you've got other trash HTML too (not related to the sidebar problem): the table cells with the images have two contradictory span tags and one p tag enclosing the image, all of them unnecessary. I don't know what you're using to create those tables (smells like... Word), but you'd better find another way!