Noticed this of the Custom PC site :
'ViewSonic has issued a customer service bulletin for its VX range of its LCD displays, regarding the screen not sitting square to the stand.
Specifically, the model numbers: VX922,VX924, VX724, VX715. The serial numbers of the machines affected are: P21,PMQ,PV0,P21,PL5,PSN,PXU,Q5A,PS3.
'We have been alerted to a potential problem on all ViewSonic "VX" LCD models,' reads the communication from ViewSonic. 'The problem is being described as "the screen is not sitting level on the Stand/Base" or that the "screen is slightly tilted even when placed on a flat surface". After investigation, this appears to be due to the assembly in the factory or during transportation and can easily be rectified WITHOUT granting an RMA (Customer Fix).'
The company supplies a picture of the back of the LCD monitor, where it is attached to the stand. It says that if the customer 'loosens' the four screws high-lighted in the picture, they will be able to move the screen enough to level it.
Alun Williams'
I just measured mine and it is 2mm lower on the left hand side - I have to send it back anyway as it has 2 dead pixels
but has 90 days 0 dead pixel warranty. 
Anyone has experiance with their service?
'ViewSonic has issued a customer service bulletin for its VX range of its LCD displays, regarding the screen not sitting square to the stand.
Specifically, the model numbers: VX922,VX924, VX724, VX715. The serial numbers of the machines affected are: P21,PMQ,PV0,P21,PL5,PSN,PXU,Q5A,PS3.
'We have been alerted to a potential problem on all ViewSonic "VX" LCD models,' reads the communication from ViewSonic. 'The problem is being described as "the screen is not sitting level on the Stand/Base" or that the "screen is slightly tilted even when placed on a flat surface". After investigation, this appears to be due to the assembly in the factory or during transportation and can easily be rectified WITHOUT granting an RMA (Customer Fix).'
The company supplies a picture of the back of the LCD monitor, where it is attached to the stand. It says that if the customer 'loosens' the four screws high-lighted in the picture, they will be able to move the screen enough to level it.
Alun Williams'
I just measured mine and it is 2mm lower on the left hand side - I have to send it back anyway as it has 2 dead pixels
but has 90 days 0 dead pixel warranty. Anyone has experiance with their service?
