I also understand they have an action that can hold a nasty surprise for those not familiar with it. From what I understand, the bolt is opened by sliding the receiver cover forward, and then pulling it back, which opens the bolt.
From what I heard, the nasty surprise is where if you pull the bolt open with the safety on, it will hold the bolt open, but without locking it back, so if you are fiddling with the action, the bolt could come forward and hammer your fingers in a way that makes Garand Thumb look like a minor injury in comparison.
Don't let that scare you out of the ljungmann. Both the Ag42 and its 7.92x57 mauser descendent, the Hakim are both nice rifles that are supposed to be very nice to shoot.
I also like the wood stock with the 10-round protruding magazine appearance of the Ljungmann, and other rifles like the SVT 40, FN 49 and Kar 43.