The tooltips aren't consistent. I know that this is not necessarily a bug, but I figured I'd still post it here.
The Constitution skill states that it grants 0.5 Evasion per level, while the item Weak Glyph states that it grants 5% Evasion. Weak Glyph increases the Evasion in the stat sheet by 5%. Strictly following the tooltip, one point in Constitution should then grant 50% Evasion, since it states 0.5, not 0.5%. Since the actual gain in the stat sheet is 0.5%, the tooltip should say 0.5%.
Similarly, Reflexes grants 1 Spell Haste per level according to the tooltip. The gain in the stat sheet, however, is 1%, so the tooltip should say 1%, not 1. (Haste on items is also given in %, like with Evasion).
The Constitution skill states that it grants 0.5 Evasion per level, while the item Weak Glyph states that it grants 5% Evasion. Weak Glyph increases the Evasion in the stat sheet by 5%. Strictly following the tooltip, one point in Constitution should then grant 50% Evasion, since it states 0.5, not 0.5%. Since the actual gain in the stat sheet is 0.5%, the tooltip should say 0.5%.
Similarly, Reflexes grants 1 Spell Haste per level according to the tooltip. The gain in the stat sheet, however, is 1%, so the tooltip should say 1%, not 1. (Haste on items is also given in %, like with Evasion).