Some of these may have already been caught. If that is the case, I apologize! I thought it would be easiest to provide links and count multiple errors in threads rather than making a new section for each specific error.
Board/Thread: RulesQuoted Error: "We do encourage our players to make characters from a wide variety of backgrounds with a variety of indivual traits."
Problem: Indivual (individual)Board/Thread: Activity PolicyQuoted Error: "Individuals who play characters with these ranks are expected to PM a moderator or administrator every two month with links to a minimum of two threads where their characters are fulfilling their duties."
Problem: two month (two months)Board/Thread: Halls PostQuoted Error: "However, it still works collectively to perserve recipes and techniques vital to keeping the people of Pern fed."
Problem: perserve (preserve)Quoted Error #2, same thread: "The Tannercraft is known to have a rivalry with the Weaverhall; in terms of leather which is intended as garments, many tanners have an eye for artistry and fashion."
Problem: leather which is (leather that is)Board/Thread: Dalibor History (timeline post)Quoted Error: "Gold Risk and several other bonded whers are killed during an attack by a red wild."
Problem: red wild (wild red)Board/Thread: Candidacy OverviewQuoted Error: "At Dalibor, candidates for whers are teenagers to adults who have informed Audren of their intentions and do not have a criminal past; they typically intend on becoming priderunners within the Weyr."
Problem: intend on (intend to)Board/Thread: Details of ThreadQuoted Error: "Water drowns it, cold turns it to dust, and fires destroys it, but Thread is resistant to all other forces"
Problem: fires destroys it (fires destroy it / fire destroys it)...
Also missing a period at the end?Quoted Error #2: "Dissection reveals a mass of tightly wound fibers, tubes, and liquid heluim."
Problem: heluim (helium)Quoted Error #3: "Captured ovoids, when exposed to warm laboratory conditions, explode into a writhing, devouring mass that later melts into puddle of mush after a short period without food."
Problem: into puddle of mush (into a puddle of mush / into puddles of mush)Quoted Error #4: "Wingseconds fill in for their wingleader when required and help convey as well as enforce orders and instructions from their wingleader to their wingriders"
Problem: Missing a period at the end...Quoted Error #5: "Smaller Weyrs will also have smaller wings and and low-level wings designed for Queens usually have fewer riders than regular wings"
Problem: and and (and)...
Also missing a period at the end.Board/Thread: Dragon OverviewQuoted Error: "They have multifaceted eyes that change color depending on the their mood: red for anger, hunger, fear, lust, or pain; orange for alarm, hunger, agitation, panic, suspicion, excitement, or agitation; yellow for anxiety, fear, worry, or concern; green and blue for happiness or contentment; purple and lavender for worry, stress, or lust; and gray for deep sadness or pain."
Problem: the their (their)Quoted Error #2: "However, this ability is not know and cannot be consciously activated."
Problem: not know (not known)Board/Thread: Dragon ColorsQuoted Error: "Occurrence: 0.5% of dragon poplulation"
Problem: poplulation (population)Quoted Error #2: "Reaching physical maturity at eighteen month, irons reach sexual maturity at twenty-one to twenty-four months."
Problem: eighteen month (eighteen months)Quoted Error #3: "Reaching physical maturity at eighteen month, bronzes reach sexual maturity at twenty-one to twenty-four months."
Problem: eighteen month (eighteen months)Quoted Error #4: "They are neither possessive nor aggressive and typically act with a certain sublety."
Problem: sublety (subtlety)Quoted Error #5: "Fiercely jealous and protective, they don't take kindly to to their riders or themselves being hurt."
Problem: to to (to)Quoted Error #6: "Reaching physical maturity at eighteen month, viridians reach sexual maturity at twenty-one to twenty-four months."
Problem: eighteen month (eighteen months)Quoted Error #7: "Reaching physical maturity at eighteen month, browns reach sexual maturity at twenty-one to twenty-four months."
Problem: eighteen month (eighteen months)Quoted Error #8: "Reaching physical maturity at eighteen month, purples reach sexual maturity at twenty-one to twenty-four months."
Problem: eighteen month (eighteen months)Quoted Error #9: "Though their hides can bear slight tints of color, they generally a uniform shade of jet black."
Problem: they generally a uniform (they are generally a uniform / they generally are a uniform)Quoted Error #10: "Reaching physical maturity at eighteen month, blacks reach sexual maturity at twenty-one to twenty-four months."
Problem: eighteen month (eighteen months)Board/Thread: Weyrlinghood OverviewQuoted Error: "Rider of female dragons who clutch typically receive lessons outside these about hatchings and egg care from one of the Weyrwomen during the final few months of their weyrlinghood."
Problem: Rider (Riders)Board/Thread: Dragon Clutch ChartsQuoted Error: "RARE: 2.0% to 5.0% of egs"
Problem: egs (eggs)Board/Thread: Wher ColorsQuoted Error: "Reaching physical maturity at eighteen month, irons reach sexual maturity at twenty-one to twenty-three months."
Problem: eighteen month (eighteen months)Quoted Error #2: "The original King color, bronze whers are the second largest males and range in size from 7.5 to 8 feet in length from nose to rump and stand roughly 5 feet in height. to rump."
Problem: in height. to rump. (in height.)Quoted Error #3: "Reaching physical maturity at eighteen month, bronzes reach sexual maturity at twenty-one to twenty-three months."
Problem: eighteen month (eighteen months)Quoted Error #4: "Reaching physical maturity at eighteen month, browns reach sexual maturity at twenty-one to twenty-three months."
Problem: eighteen month (eighteen months)Quoted Error #5: "The second smallest color after grays, they range from 4.5 to 5 feet in length and stand roughly by 2 feet at the shoulder."
Problem: roughly by 2 feet (roughly at 2 feet)Board/Thread: Wher Clutch ChartsQuoted Error: "RARE: 2.0% to 5.0% of egs"
Problem: egs (eggs)Board/Thread: Firelizard ColorsQuoted Error: "Bold and egocentric, they love to fly Queens, give orders, and make sure everyone know where they are."
Problem: everyone know (everyone knows)Quoted Error #2: "Selecting browns, purples, bronzes, and the occasional male yellow or large blue as mates due to their size and strengt, they produce one to six eggs after reaching maturity at twenty-five months of age."
Problem: strengt (strength)Quoted Error #3: "Reds measure roughly one foot and eleven inches in length, and make up two percent of the firelizard population - or they will, one their new genes have been fully integrated."
Problem: one their new (once their new)Quoted Error #4: "Reaching sexual maturity at nineteen months, they can fly any female, though female whites and pinks are uncommon ue to the fact they measure half the length of the average brown."
Problem: uncommon ue (uncommon due)Board/Thread: Pillie Clutch ChartsQuoted Error: "RARE: 2.5% to 4.4% of egs"
Problem: egs (eggs)Board/Thread: Feral Pernese SpeciesQuoted Error: "Children are warned not to wandered off for fear of getting eaten by one."
Problem: not to wandered off (not to wander off)