Look at this post:
http://portonmath.wordpress.com/2009/10/20/generated-lattice-finite-meets/
Some of my LaTeX formulas are very long. I noticed that these formulas are displayed with a dark border at the top and left sides of a formula.
This is not very bad but indeed looks like a bug in WordPress.
Please consider to remove these borders.
The blog I need help with is portonmath.wordpress.com.