RC4: non-painting rectangular area

[scratch]

intermittently i'm seeing a rectangular area that doesn't paint in the lower-left corner on only medium-sized images (around 400x400). this never happens with larger images or smaller images. it seems to happen more often than not when i have a lot of programs open, so maybe a memory or resources issue? but considering all other programs work just fine as do large and small images in XnView, it seems like it should be fixable. i can provide screenshots if necessary. in case it's important, first time i ever saw this occur was with RC3.

XnView 1.80 <x>

[xnview]

intermittently i'm seeing a rectangular area that doesn't paint in the lower-left corner on only medium-sized images (around 400x400). this never happens with larger images or smaller images. it seems to happen more often than not when i have a lot of programs open, so maybe a memory or resources issue? but considering all other programs work just fine as do large and small images in XnView, it seems like it should be fixable. i can provide screenshots if necessary. in case it's important, first time i ever saw this occur was with RC3.

Yes, please send me screenshots.

[scratch]

i will take some next time it occurs and post them here (most likely later today).

[scratch]

here's a screenshot. as you can see, this area still shows the explorer window it popped up on top of. were i to cycle to the next image, it would show part of this image there.

[xnview]

here's a screenshot. as you can see, this area still shows the explorer window it popped up on top of. were i to cycle to the next image, it would show part of this image there.

But how to reproduce it?
Someone with same problem?

[scratch]

like i said, it happens when i open lots of programs (but not to the point that anything else stops working). maybe when a large percentage of xnview is running in virtual memory instead of physical memory?