From the Wiki:
'A wizard begins play with a spellbook of (3 + Int modifier) 1st-level spells. At each new wizard level, he gains two new spells of any spell level or levels that he can cast (based on the new wizard's level) for his spellbook.'
So, in the process of leveling to 5 on my Wizard, I was surprised when I got to the spell screen, to see 'You have 0 spells available.'
Any ideas why I didn't get the 2 spells at this level?