Try unchecking align to grid, you have nothing to lose.
Since this just began happening today, you might try using System Restore to
take you back to yesterday or the day before and see if that clears it up.
Start\All Programs\Accessories\System Tools\System Restore. Or, if you can
think of anything you've changed, something new you installed, something you
removed, maybe some disk cleanup utility that might have deleted something,
try undoing what you did if you can think of anything.
The "It only started happening today" argument only holds water if
everything remains the same. If there was one change, just one, that might
be what made the difference.
We have people come in here reporting an error message, "Unmountable boot
volume." This is almost invariably caused by using a 40-wire cable instead
of an 80-wire UDMA cable. The users will argue with us that the system has
worked fine up until now. However, the system was borderline and, as such,
some small change, some new install, something they removed is all it took
to push it over.
I only make that point as an example, it often doesn't take much to make
such a difference. Sometimes the most inconsequential seeming of changes
can just upset everything you thought was perfectly stable.