Page Switches Dimensions when Scrolled

For certain page dimensions and zoom levels, I have noticed that the page dimensions appear to change when you scroll up and down or left and right. It has caused me to be confused as to the dimension of the page and accidentally place things which are off the page, but appear to be on the page. I scrolled downwards and the bottom, as it approached the window edge, "popped out" and extended to infinity. After I scrolled past that, it returned to normal dimensions. This has happened several times, most recently scrolling vertically on 27x18 units at 60% zoom. This happens when both scrolling with the mouse wheel and when dragging the scroll bar. I am using Firefox 19.0 and Windows 7. There are currently no other people in my campaign to confirm this.

Nilmrots, could you please provide a screenshot and the zoom level? I believe this is a bug where at specific zoom levels the canvas gets extended to meet the edge of the map.  - Gauss

This was at 60% zoom. Here are some screenshots with a token as a reference point. Top of Scroll Bar Middle of Scroll Bar Bottom of Scroll Bar Thank you for your help.

So I can confirm if this is the same bug could you please follow these steps: 1) Place a map into the game.  2) Increase the map size to match the normal canvas size 3) set your zoom etc to the level that produces the bug.  4) take screenshots so I can see.  Thanks in advance. - Gauss

Alright, I added a map which fits the normal dimensions of the page(27x18). In this set of screenshots, there is a token off the bottom of the map to show that it disappears when you scroll down or change zoom. The first 3 pictures are 60% zoom, the last picture is 50% zoom. Top of Scroll Bar Middle of Scroll Bar Bottom of Scroll Bar 50% Zoom Thank you for your help, and I hope this problem can be resolved.