[font color=\'#000000\']After shooting for two years with the Canon D30, I don't think it's so much that highlights are a "problem", but rather that one must be careful with one's exposure - much as with slide film. When we talk about the "lattitude" of film, we generally understand that negative film has a wider lattidude than slide film. I suspect that most digital SLRs are someplace in between - but have not confirmed this.
As with any camera/film combination, when shooting digital one must learn about the metering system and, through experience, learn how to set the "correct" exposure for a scene. Most digital cameras offer the advantage of showing a historgram of the shot you just took, which provides immediate feedback. If you see that the exposure was wrong, you can make adjustments for subsequent shots.
Hope This Helps!