Nice website. Out of curiosity how have you implemented the [latex] option. Do you still use CodeCogs? btw. Thanks for mentioned CodeCogs in your post ;(

Looking into the Alias suggestion you made, I realised a much simpler option. If you use png image files, then this will solve all of your problems. For example, change:

http://latex.codecogs.com/gif.latex?\color{white}x^2+3

to

http://latex.codecogs.com/png.latex?\color{white}x^2+3

As in

The reason this works so much better is that png has an alpha channel, which gifs don't. In otherwords the png has an entirely different layer for the equation text that seperates it from the background - which you've made transparent. Thus unlike earlier, there is no issue identifying the edges of text, and regardless of background and forground colors everything works perfectly.

I'm wondering if I should change the default in the equation editor to png files. png is fully suppored by all web-browsers, ms-word etc, so there shouldn't be any problems.