I use WAZE for more than 2 years now, and 3.5.3 causes me issues on my iPhone 4.
Most of the time I use it in my car, connected with USB to my radio system in order to have both music and navigation voice on my sound system.
I have noticed that with 3.5.3, WAZE has became very slow and screen buttons are not reactive when navigation is on : I click, then the icons box opens around 20 sec after.
=> very difficult to warn when traffic jam, accident, ...
=> to stop the application, it takes a long ... long time !!
=> boxes have a strange size since this upgrade
=> switching from landscape to portrait causes crazy movements for the screen button
Facebook connection is strange : I can see that I am connected, but neither my picture profile appears nor my friends !
I have disconnected, then connected again and the issue is still present.
I have noticed that WAZE lags more when my iPhone is connected to my radio, than when it is not.
I am a real fan of WAZE and contribute to promote it around me, so that's a pity for me not to be able to use it as I did it previously and to demonstrate it to convince others
Fortunately, I had 3.5.1 in my trash, so I put it back in my iPhone and it really work better.
Then I am waiting for next update to come.