The reason for the discrepancy is that a portion of the 64 MB of RAM is being used by the Pocket PC 2002 OS. Viewsonic initially stood by their claims saying that it is common practice within the computer industry to list physical memory available rather than stating the amount of memory that is acutally avaiable to the consumer, but pressure from enthusiast web sites has caused a change of heart within the company. Viewsonic has altered their marketing material. It now contains a disclaimer stating the lower amount of memory available to the user.
In addition, a Viewsonic spokesperson has stated that any consumer who purchased a V35 under the assumption that they would have access to the full 64 MB of RAM may return the device for a full refund.