Hi eranro and welcome to 4WM
Good to have you here and I am glad you enjoy what we do here.
Let me first say that the i780 is the cause of your problems, the device runs WM6 granted but it is the screen size causing the trouble. The 6 button plugin, the customiser pack and especially the ripple theme are all made for 320x240 screen sizes and you are using it on 320x320 screen, that is why it cannot display properly.
The vibrate problem relates to appointments stuck in the notification queue but can be sorted by running MemMaid on your device and clearing the queue.
The audio player, brightness fix and tab order may also be down to the foibles of the Samsung operating system, and is all I can suggest is to soft reset and then try installing them, and soft reset afterwards.
I hope that helps you.

__________________
O2 Ignito (HTC Diamond), E-TEN Glofiish V900, O2 Orbit 2 (Polaris), HTC Trinity, Vodafone v1615 (Kaiser), HTC Tytn (Hermes) + Others!
If you enjoy this site then please ensure it's survival with a Donation or a Subscription.