I have created an image with multiple layers, paint groups, layer groups etc.
The image saves okay as .ai or even export to .png. However when i use the save for web feature my topmost layer group is missing from the image.
The only difference in this layer that I can see from any others, is that instead of the usual 'eye' icon in the layer visibility select, there is a solid rectangle with a border in this place.
Would someone please explain what this icon indicates, how it manipulated and whether it has any bearing on my Save to Web issue.