The line just above EINSTEIN's head contains a transparent pixel (shown in green) that should be blank:

To make the pixel blank:

POKE 47249,252

Also, when EINSTEIN is lying down, the line above his head is entirely blank:

To make the line transparent:

POKE 47254,255

When BOY WANDER is sitting on the floor, there is a blank line above his head:

To make the line transparent:

POKE 47265,255

MR CREAK's ear is transparent when he's midstride, which means it will appear filled in or blank depending on the background:

To make the ear always blank:

POKE 53356,171

There is a blank pixel in MR CREAK's walking stick hand when he has his other arm raised (below, right), but the corresponding pixel is filled in when he is standing or walking (below, left). This difference is most noticeable when MR CREAK is wiping or writing on a blackboard.

To fill in the blank pixel:

POKE 52089,30 POKE 52345,222

There are two transparent pixels in the crutch of MR WACKER's trousers:

To make these pixels blank:

POKE 53896,228

There are blank pixels near MR WITHIT's and ALBERT's shoes that should be transparent:

To make these pixels transparent:

POKE 53461,95 POKE 53973,95 POKE 54485,223		POKE 54487,250

There are two blank pixels poking out of MR WITHIT's and MISS TAKE's hand:

To make these pixels transparent:

POKE 51417,235

There are slight differences between MR ROCKITT's coat when he is standing or walking (below, left) and when his arm is raised (below, right). The differences are most noticeable when he is wiping or writing on a blackboard.

To remove these differences:

POKE 51644,232 POKE 51900,232 POKE 52668,36 POKE 52924,164 POKE 53180,44 POKE 53436,172 POKE 53692,46 POKE 53948,174 POKE 54204,54 POKE 54460,182 POKE 54716,53 POKE 54972,181

There is an extraneous blank pixel near ALBERT's waist:

To make the pixel transparent:

POKE 53853,223

There are two extraneous blank pixels at the back of ALBERT's head, one at the top and one at the bottom:

To make these pixels transparent:

POKE 52316,191 POKE 54876,191

There is a transparent pixel that should be blank near ALBERT's armpit when his arm is raised:

To make the pixel blank:

POKE 54865,127

The mask around the boys' hands in phase 2 of their walking animation (the right hands in the images below) contains an extraneous blank pixel that looks amiss in the little boy's sprite (rightmost image):

The corresponding pixel is transparent in phases 1 (shown below), 3 and 4:

To make the extraneous blank pixel transparent:

POKE 47209,231

In phase 1 of HAYLEY's and the little girls' walking animations, and also in HAYLEY's hitting sprite, the tip of the shoe is filled in, as shown in these unmasked graphics:

But the mask erases the tip of the shoe, and does not blank out the pixel behind the shoe:

To fix the mask:

POKE 50877,238

Also, in phase 4 of HAYLEY's and the little girls' walking animations, there is an extraneous blank pixel near the back foot that should be transparent:

To make this blank pixel transparent:

POKE 49864,239

In phase 2 of the boys' walking animations, the shoes are filled in, as shown in these unmasked graphics:

But the mask erases the body of the shoe:

To fix the masks:

POKE 50281,222

The base of the 'o' in the word 'Score' in the score box is shifted one pixel to the left:

To shift it one pixel to the right:

POKE 59001,204