I have the column indicator set to show at column 90. It works fine as long as the window I'm in is not horizontally scrolled. However, as I scroll to the right a bit, the column indicator moves with the scrolling and is no longer at column 90, but rather at "offset + 90 columns" where offset is the number of scrolled columns.
I'm using Visual Studio 2005, and I noticed this with the last 3 builds of VAX (currently using: 1557)
Update: It doesn't seem to occur when you scroll horizontally bit by bit (for example, by dragging the thumb or repeatedly clicking the right arrow). It occurs when you scroll to the end with one click (by clicking to the right of the thumb, in the empty area) or keep clicking the right arrow after you've already scrolled to the end.