Starting with tech level questions, as these are likely not errata in 3145:
P. 33, Anzu entry (tech is currently "Inner Sphere", but has PPC capacitors and CASE II)
P. 35, Carronade entry (tech is currently "Inner Sphere", but has CASE II)
P. 37, Neanderthal entry, (tech is currently "Inner Sphere", but has PPC capacitors and M-Pods)
Grammar problems:
P. 26, Violator entry:
"When used properly the Violator..."
Deployment section, "When elements of the First Orloff Grenadiers joined the planetary militia to take back the capital they..."
(in both cases subordinate/dependent clause should be separated with a comma)
P. 28, Sarath entry:
Deployment section, "However the Fourth Hussars were eventually ejected from Aitutaki and the defeat was seen as a bad omen for the new Sarath." (Conjunctive adverbs should have a comma, conjunctions joining separate independent clauses should have a comma)
P. 30, Quasimodo entry:
Capabilities section, "Adding jump jets that aren’t unheard of in a Hunchback improves the mobility of the Quasimodo,..." (reads awkwardly)
P. 40, Juliano entry:
"Following the fall of Marik-Stewart the Juliano" (subordinate/dependent clauses should be separated with a comma)
P. 42, Picaroon entry:
Deployment section, "The first reported clash between two Picaroons occurred in 3115 when a raid..." (subordinate/dependent clause should be separated with a comma)