Not really sure if Bethesda has any other more preferred way of reporting bugs, so putting it here:

When you use targeted conjuration spells, the crosshair turns red if you are aiming at an invalid location.
This makes the crosshair visible even if you have turned off crosshairs in the video settings, and then it stays visible afterwards, at least for a while.
Not sure if it applies to any casting, or only dual casting.

Not the most serious issue, but putting it out there since it shouldn't be too hard to fix the crosshair check.