[Samsung Galaxy Nexus] agormog:
If I use USB OTG the mouse moves correctly, no inverted Y axis there.

logcat events which mention touchscreen:

I/EventHub( 194): New device: id=6, fd=140, path='/dev/input/event1', name='Melfas MMSxxx Touchscreen', classes=0x14, configuration='/system/usr/idc/Melfas_MMSxxx_Touchscreen.idc', keyLayout='', keyCharacterMap='', builtinKeyboard=false
I/InputReader( 194): Touch device 'Melfas MMSxxx Touchscreen' could not query the properties of its associated display 0. The device will be inoperable until the display size becomes available.
I/InputReader( 194): Device added: id=6, name='Melfas MMSxxx Touchscreen', sources=0x00001002
[...]

I/InputReader( 194): Device reconfigured: id=6, name='Melfas MMSxxx Touchscreen', surface size is now 720x1280, mode is 1
[...]

I/Pointer ( 194): Input Device 0: tuna-gpio-keypad
I/Pointer ( 194): Keyboard Type: non-alphabetic
I/Pointer ( 194): Sources: 0x101 ( keyboard )
I/Pointer ( 194): Input Device 5: Tuna Headset Jack
I/Pointer ( 194): Keyboard Type: none
I/Pointer ( 194): Sources: 0x80000000 ( )
I/Pointer ( 194): Input Device 6: Melfas MMSxxx Touchscreen
I/Pointer ( 194): Keyboard Type: none
I/Pointer ( 194): Sources: 0x1002 ( touchscreen )
I/Pointer ( 194): AXIS_X: source=0x1002 min=0.0 max=719.0014 flat=0.0 fuzz=0.99861306
I/Pointer ( 194): AXIS_Y: source=0x1002 min=0.0 max=1279.0007 flat=0.0 fuzz=0.99921936
I/Pointer ( 194): AXIS_PRESSURE: source=0x1002 min=0.0 max=1.0 flat=0.0 fuzz=0.0
I/Pointer ( 194): AXIS_SIZE: source=0x1002 min=0.0 max=1.0 flat=0.0 fuzz=0.0
I/Pointer ( 194): AXIS_TOUCH_MAJOR: source=0x1002 min=0.0 max=1468.6047 flat=0.0 fuzz=0.0
I/Pointer ( 194): AXIS_TOUCH_MINOR: source=0x1002 min=0.0 max=1468.6047 flat=0.0 fuzz=0.0
I/Pointer ( 194): AXIS_TOOL_MAJOR: source=0x1002 min=0.0 max=1468.6047 flat=0.0 fuzz=0.0
I/Pointer ( 194): AXIS_TOOL_MINOR: source=0x1002 min=0.0 max=1468.6047 flat=0.0 fuzz=0.0

If you have ANY idea whom I could write (I already twittered Paul, no answer though

I also asked Jean-Baptiste Queru, but he answered: "@agormog Nope, no idea, sorry, I have very little visibility over what those retail builds."

Shall I try to RMA?

Please If you have ANY idea try to help me, I am really desperate

Edit:

uid=0 gid=0@android:/ # cat /system/usr/idc/Melfas_MMSxxx_Touchscreen.idc
# Copyright (C) 2011 The Android Open Source Project
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

#
# Input Device Calibration File for the Tuna touch screen.
#

# Basic Parameters
touch.deviceType = touchScreen
touch.orientationAware = 1

# Size
touch.size.calibration = diameter
touch.size.scale = 10
touch.size.bias = 0
touch.size.isSummed = 0

# Pressure
# Driver reports signal strength as pressure.
#
# A normal thumb touch typically registers about 200 signal strength
# units although we don't expect these values to be accurate.
touch.pressure.calibration = amplitude
touch.pressure.scale = 0.005

# Orientation
touch.orientation.calibration = none