Just pasting here the Update notice from the Forums main page:

UPDATE - We have fixed the issue that caused Vuforia to crash on recently released Android devices. A new SDK package for Android (2.8.8) and a new extension for Unity (2.8.9) are now available in the SDK download section

(https://developer.vuforia.com/resources/sdk/).

Hi Russel,

no, that was a different issue.

But it is now solved. You can now download the latest SDK and samples.

Hello AlessandroB,

was this the same problem like here?

http://www.tasharen.com/forum/index.php?topic=8415.0

and here:

https://github.com/opensciencemap/vtm/issues/52

Thank You,

Oli

UPDATE:

Please check the NOTICE we just posted on the main Forum page:

https://developer.vuforia.com/forum

Vuforia Apps crashing on some devices : We are aware of an issue that causes Vuforia to crash on certain newer devices such as the Samsung Galaxy S5 and the HTC One (M8). The Vuforia team is looking into this issue with the utmost urgency and will update this notice as we work to resolve this issue. We apologize for any inconvenience this may have caused to you and your customers.

Thanks for the details.

We are now investigating the issue.

I will post an update as soon as I have some news. 

I am having the same issue with galaxy S5 crashing I have an app made in unity and an app made using eclipse and both of them force close right away. I am testing using the galaxy S5 SMG 900V running android 4.4.2

I also tried starting a new project with just the video playback sample without modifying anything and it still force closes right away.

Same problem here...I start to receive negative (1 star) ratings on my apps all from Galaxy S5.

All the feedback are about black screen and sudden crash.

Please help...:(

Also, if the issue is specific to the S5, could you provide exact model number (that would be really helpful) .

Hi,

have you tested on other devices ? do you get same problem on other devices ?

have you built one of the Vuforia samples ? or your app ?