1) I wish the newbies would take time to read the last months (or so) Headers to see if the subject may have already come up

b4efore starting a NEW thread.
Calibre evolves fast.
2) could the Mods

threads on obsolete versions and or hang a Obsolete Tag on it.
IMHO we have too many stickies already

( I was taught the rule of 6. Only show the user 6 choices or they tend to glance over them0)
Might I suggest more sub-forum. (Some that comes to mind)
Device connection Help
Importing Help
Converting to ... (might be a separate sections for problem high traffic formats)
Plug-In Use and Development
Personally, I prefer the "Cookbook" recipe type user manual.
So you want to:
Start with "C" and get "N" (section 22: Conversions-Comics )
Reference manuals are great for coding Syntax

but can fail on the "when and Why" (but usually fail on the : use this one... )
my 2 cents (And I am probably guilty of sounding peevish after seeing 6 threads (headers) in 30 days on nearly the EXACT same question).