Row height being different?

[Heath123]

The FAQ says this:

Should rows be the same height?
This is not critical, but it's highly recommended that the rows are the same height. Row height is determined during initialization, picking some of the first rows and then using those for all calculations.

I'm confused about what this means - so if only a few rows are used, then surely if every row is a different height then that will only work as an approximation and it will look wrong? So that would mean it is critical? I want to use this to load comments and each comment might have a different number of lines

[Heath123]

#62
Looks like it won't work then