By Katie Marsal

Published: 08:55 PM EST

As Apple continues to investigate a problem that caused premature discoloration in some of its white MacBook computers, owners of the notebooks are discussing a separate anomaly.

It appears that a number of MacBook users have been experiencing a "squishy" or unresponsive track pad button. On affected systems, the button makes a "ratchet type" sound and sticks if its triggered in certain places, making double-clicking difficult or impossible.

The malfunction does not affect all MacBooks, but can appear in any of the three models. Some users have had success getting their machines replaced, while others have been turned away.

One user, who had no success rectifying the issue during a Genius Bar visit. has detailed a creative solution, first discovered in a posting on Apple's MacBook support forums. After removing the battery, the idea is to place a small amount of folded paper in the cut-out near the underside of trackpad and then replace the battery. The quick-fix applies pressure underneath the trackpad button, rendering it workable.

Meanwhile, it's being reported in some outlets that Apple has "officially recognized" the problem where some white MacBooks show signs of discoloration quite rapidly. However, this is not the case.

According to Macworld UK, the company "is requesting that users who claim to have been affected should contact Apple support, as the MacBooks remain under warranty and the company needs to explore the claimed problem to establish its cause."

In a statement, Apple said: "Apple is aware of this input and is looking into it. If a customer has any technical issues, they should contact AppleCare."