When you insert code blocks into your article, the online editor is automatically adding borders to the code blocks.
But when you save the article, you might see that your code blocks are losing their borders...
Here's the solution...
Edit your article again, go into HTML editor.
Replace all instances of :
<div class="reCodeBlock" style="border-style: solid;border-width: 1px; padding: 1px 4px;">
Just as an example, to demonstrate what happens:
"One HTML fix a day, keeps the administrator away!"