Okay well I didn't mean to insinuate that they don't conform to standards in general. But you can see that if the developers prioritize their time based on browser usage, Opera might be brushed aside at first.
Idealy, developers could target one set of standards and their product would be functional across all browsers that implement them. In general, the bigger browsers all act relatively the same (not IE) when standards-compliant code is used, so if what works for them doesn't in Opera, then that's a problem.
Idealy, developers could target one set of standards and their product would be functional across all browsers that implement them. In general, the bigger browsers all act relatively the same (not IE) when standards-compliant code is used, so if what works for them doesn't in Opera, then that's a problem.