Exclamation Mark On Printer Icon
Every time I print from my iMac to my HP Photosmart 5510 printer, an exclamation mark in a yellow triangle appears on the printer icon in my Dock, like this:
What does this mean?
The "Now Printing" window that pops up on my screen looks like this, again with an exclamation mark over the printer's icon:
iMac, Mac OS X (10.6.8), iMac (21.5-inch, Mid 2010) 12GB RAM