Apple is not happy with Samsung, they've filed a patent infringement lawsuit against Samsung (who have just sold their HDD operations to Seagate btw!) for the Galaxy-branded line of products. Apple is claiming that Samsung have infringed on their rights with the Galaxy S phones and Tab by violating various patents which were assigned to Apple by US PTO.
Apple also think that the Galaxy S phones and Galaxy Tab look like their iPhone and iPad, which is a violation called "trade dress". Apart from sounding like Apple are saying Samsung are cross-dressing, Apple are seriously pissed about this and are claiming that the Galaxy Tab took its design from the iPad with the same aspect ratio, rectangular shape, rounded corners (oh no!) and similar black border - referencing the similarities found in the iPad.
A representative from Apple said to Mobilized:
It's no coincidence that Samsung's latest products look a lot like the iPhone and iPad, from the shape of the hardware to the user interface and even the packaging.. This kind of blatant copying is wrong, and we need to protect Apple's intellectual property when companies steal our ideas.