Also seen on Gentoo Linux since the 2017-05-08 beta client update.
Confirmed on Debian Linux 8.
With Steam client version May 19 2017, the issue has been fixed.
The missing SDL symbol issue is being tracked at #4951.
Thanks for retesting, closing.
This is still happening on Fedora 42
Nothing extracted yet.
When I close Steam, Steamwebhelper keeps running. To stop it, I have to kill the process through the System Monitor.
Steps to reproduce:
NOTE: Only the beta seems affected