It has been less than a month after I upgraded my Javelin to OS 5.0.0681 from Hutchinson Asia. It was not good. Battery life was short, less than 12 hours or so. It mad me have to recharge my device every 12 hours or so. It was huge inconvenient for me, especially during my trips to Bandung and Jakarta. Memory leaks was also severe, I was down to less than 80 MB in 3 days. Previous OS installations would hold memory above 90 MB after more than a week.
I decided to remove the OS and replace with the same version from Indosat. So far, it has been better. The time between charging is more than 24 hours. Memory leaks is not as severe as Hutchinson version. It is still around 100 MB after two days. All and all Indosat’s version is much better than Hutchinson Asia’s (IMHO).