Wow, Sweden goes to great lengths to catch rapists!
Yeah, nothing to do with secrets at all

Wow, Sweden goes to great lengths to catch rapists!
Nah, the UN backed him.
Not that the UK government cares, the moment he steps out in public he'll be on his way to Guantanamo Bay.
Wow, Sweden goes to great lengths to catch rapists!
I expect the immediate return of my passport and the termination of further attempts to arrest me
Wow, Sweden goes to great lengths to catch rapists!
Wow, Sweden goes to great lengths to catch rapists!
How on earth the UN could rule that it was arbitrary detention I have no idea. Since when was hiding in an embassy to escape arrest arbitrary detention? He is choosing to be there rather than follow due process.
It's not all about the embassy, there was also the groundless solitary confinement in 2010. Also I think (reading between the lines) they're saying the charges in Sweden were weak and likely to end up in his being extradited to the USA, where he'd be unlikely to fair treatment. The fact that he's "forced" to hide in the embassy is "effectively" arbitrary detention. In other words, he's not been tried nor found guilty of anything, yet he's trapped in a building against his will.
That opinion is backed by several other bodies too, e.g. the Center for Constitutional Rights.
Edit: the problem is he wouldn't be given "due process" (your words), his arrests was irregular from the very beginning and (probably) set up to lead to his punishment in the US. The trouble is they don't know what to do with him in the US (read this paragraph on wikileaks) so you can guarantee he'd be put away for some time while they worked out how to silence him.
Why would we go to the effort of extraditing him to Sweden when it is arguably easier to extradite him to the US from the UK? Or is the Swiss justice system some easy to abuse third world system? Have the Swedes made any suggestion that they would extradite him?
The article by the CCR is also somewhat biased, Assange has tried to dictate the terms of any interaction with the Swedish authorities.
Oldest trick in the book, it's called a smear campaign. When a person speaks out, the media and government will make stuff up to demonise them or just kill them. He's a damn hero.
It's not all about the embassy, there was also the groundless solitary confinement in 2010.
This has to be one of the incomprehensible decisions I've ever seen.
Do the US even care about Assange any more after Snowden?