Thanks for every one!
This issue seems to disappear after the change in config. Our site is more stable than ever before in the last week with a rather short response time during the whole week.
Upgraded to 0.4.3 today and now when a user logs in the logged-out-menu in the navbar doesn't update and always says Register and Login. Makes it so user can't log out.
nevermind. I guess actually reading threads would help.
Hehe -- glad you figured it out
No clue why npm is sometimes serving old versions of our themes...