How do I update tool images?

[resullins]

I really don't know... I've tried everything I could find online. The weirdest thing is that there doesn't seem to be a pattern to it. It does it with small blocks more often than with larger ones... but the insertion point, file size, etc... that's all random.

And I HATE IT! Grrr... I hope someone figures this out!

[yrnomad]

I haven't come up with a better solution. It is random, and very frustrating.
I've stopped updating the .png files. At 1500 blocks, and the other "wants" the users have it's become a low priority.
Looking at your profile I see you have Acad 2012, I'd hoped that Autodesk had fixed it in a newer release but haven't bothered to open the box on '11 or '12.