I just bought a beaker. (Actually, I think it's an Erlenmeyer flask, no?) It appears as a blank entry in my pack. Mousing over it shows its name. I am using Firefox/3.6.13 on Windows Vista Premium Home Edition.
Correction! The beaker (ahem - flask) and the test tube are visible, but just barely. Looks like they are an extremely light blue against a white background. Maybe a black outline would make them easier to see?