Weird aptana highlights. What do they mean?

Question

I was wondering what the highlights in the source code meant in aptana. I asked all my friends and none seem to figure it out.

They are shades of gray in front of lines that do not seem to follow any rules. Please note that line 4 is just the line cursor is on.

I have attached a screenshot to exemplify it.

Thanks.

Answer 1

Go to Window->Preferences->Aptana Studio->Themes, find the embedded source line, and adjust its background so that it matches the other lines.