The annoying thing is that HubPages has just recently made an unannounced change that converts any level-4 headings to BOLD ALL CAPS. I don't like it.
Along with that, they changed level-3 headings so they come out in serif, which clashes with all the rest that is sans serif. But the worst part of it is that the characters have a squatty aspect ratio. When they shortened the character height (with respect to level-2 headings), they forgot to slim the character width.
Way off topic: Both level-3 and -4 headings have more space before them than level-2 headings do, which should not be. This problem was probably pre-existent, and should be corrected by increasing the space before level-2 headings to at least what separates two text paragraphs.