BARD
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p16, Spells: "A bard begins play"
better: "A bard character begins play"
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p16, Spells: "Every bard spell has a verbal component (singing, reciting, or music)."
If by "music" you mean playing an instrument, then it is not verbal. Perhaps you mean "audio" or "audible" component.
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p17, Countersong: "A bard can use this bardic performance ability utilizing Perform (keyboard, percussion, wind, string, or sing)."
better: That last word should be "song."
rationale: Every type and sub-type of Perform is a noun except "sing". It should be "song" instead.
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p18, Fascinate: "The distraction of a nearby combat or other dangers"
That should be singular "danger" since it takes only a single hazard to distract.
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p18, Inspire Courage: "his allies (including himself)"
better: "his allies and himself"
rationale: The former suggests that the bard is considered to be one of the people classified as his allies.
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p18, Inspire Courage: "The effect lasts for as long as the ally percieves"
better: "The effect lasts for as long as the subject percieves"
rationale: The duration is the same for the bard as for his allies.
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p18, Inspire Competence: "The ally must be within 30 feet and able to see and hear the bard." ... "as long as she continues to hear the bard’s music" ... "A bard can use this bardic performance ability utilizing any type of Perform."
better: replace "hear" with "see and hear" if you really do mean that both senses are necessary regardless of performance type.
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p19, Dirge of Doom: "Affected enemies are shaken and take a –2 penalty on ability checks, attack rolls, saving throws, and skill checks."
correction: replace "shaken and" with either "shaken, and" or "shaken, meaning they".
rationale: The use of "and" suggests that they are both shaken and have the listed penalties. The listed penalties are the effects of being shaken, suggesting double the normal "shaken" penalty.
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p19, Inspire Greatness: "The effect lasts for as long as the ally witnesses"
better: "The effect lasts for as long as the subject witnesses"
rationale: I'm assuming the duration is the same whether the subject is an ally, or is the bard himself.
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p19, Soothing Performance: "this performance removes the fatigued, sickened, and shakened condition"
correction: "shakened" -> "shaken"
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p19, Paralyzing Show: "recieves"
correction: "receives"
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p19, Inspire Heroics: "a bard must perform and an ally must witness"
better: "a bard must perform and the subject must witness"
rationale: If the only subject is the bard himself, I'm guessing you don't require an ally to witness the performance.
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p19, Inspire Heroics: "The effect lasts for as long as the ally witnesses the performance"
better: "The effect lasts for as long as the creature witnesses the performance"
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MONK
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p28, AC Bonus: "He loses these bonuses" ... "when he carries a shield"
I think you want "when he uses a shield", since carrying one would be a matter of load rather than equipment.
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ROGUE
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p40, Resiliency
The description makes it unclear to me if the temporary hit points would result in the rogue becoming conscious and capable, or merely non-dying. The rules in chapter 9 for temporary hit points explain the common case of their application to a healthy character, but don't explain what happens if you give temp HP to a dying creature. Is that effectively temporary healing? A delay of the effects of "dying"? An extension of the number of hit points (beyond the -10 cliff) a character can lose and still be "dying" (rather than "dead")?
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p40, Trap Sense: "Trap sense bonuses gained from multiple classes stack."
What about trap sense bonuses from a race or item? Do you mean "from multiple sources"?
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p40, Crippling Strike: "Ability points lost to damage return on their own at the rate of 1 point per day for each damaged ability."
Did you mean this to be a general description of how ability damage heals? Because only one ability is damaged by Crippling Strike, yet this suggests there are multiple.
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p40, Defensive Roll: "damage in combat (from a weapon or other blow, not a spell or special ability)"
What counts as a "special ability"? If this can be specified in terms of spell-like and supernatural abilities, describe it in those terms.
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p41, Skill Mastery: "The rogue becomes so certain in the use of certain skills"
Replace one instance of "certain" for readability. For example, replace the first one with "confident" or "comfortable," or replace the second with "some" or "particular."
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p41, Master Strike: "This can have one of three effects."
better: "The rogue may choose one of three effects."
rationale: The text as written doesn't specify whose choice it is, and only with the words "Regardless of the effect chosen" even suggests it is a choice rather than a random selection.