Yes, it's April Fools day today (see coverage from our Safe and Savvy blog).
LabDev is the team within F-Secure Labs that develops and maintains our internal systems that (among other things) import, scan, analyze and categorize all incoming samples.
As it happens, LabDev has put in a subtle change to our sample management system's interface today.
Here's a screenshot:
Can't spot the joke? Well, many analysts missed it for quite a while as well. Maybe this helps.