Errors in pdb2cif:
1sos
1fcs
1fna
1hhk - error at end
1ifa - seqres missing final N
1hra - error at beginning
1mcb, 1mcc, 1mcd, 1mce, 1mcf, 1mcg, 
1mch, 1mci, 1mcj, 1mck, 1mcl, 1mcn, 
1mcq, 1mcr, 1mcs - error at beginning
1tox - SEQRES b:177 incorrectly matches PDB 187
1tbp - error at beginning
1pky - alignment error at c:323
1eta - microheterogeneity
1cbn - microheterogeneity
2hmq - microheterogeneity
1ak9 - seqres 267 in wrong place
9pti - seqres incorrect -> bad alignment
8gpb - error at end
2hhr - end of chain c has extra residues in ATOM records
1ysa - chains c and d
2plv - seqres 76,97,98 in wrong place  
2psg - PO4 is misnumbered as seqres 112
1ltb - seqres too short; seqres 329 misplaced
1lta - seqres too short; seqres 329 misplaced
1aip - seqres 403-405 for chains a and b curiously missing
1bxt - chain A has no SEQRES in PDB file
1a35 - There is an ALA at 635 and at 712, and
       pdb2cif program guessed wrong and thought that the ALA in the
       file is the one at 712 (485 in SEQRES numbering) -- but it is
       really the one at 635 (461 in SEQRES numbering).
1dbh - ATOM residues 418-422 match SEQRES 221-225, but are not indicated
       as matching

1b2t	chain = 'a' in cif & ' ' in pbd  
1b6u	chain = 'a' in cif & ' ' in pbd  
1b6u	chain = 'a' in cif & ' ' in pbd  
1chu	Alignment error at end (last 3 residues)
1cld	pdb2cif failed to align. not clear why
1cvj	pdb2cif failed to align 3 last residues
1qmm	pdb2cif failed to find/align the begining of the sequence
3hhr	pdb2cif alignment error probably because residues 237-238 don't show up on the structure.

Errors in scop:
d1a0i_1 should probably start at 306
2bir	new version of 2bir.cif.Z calls chain "-" "A" (as per the PDB file)

Atomseq errors:

1sbb	failed to locate chain c2
1iao	failed to locate chain a1 or b2
2iad	failed to locate chain b2
1aqf	failed to locate chain e1

Other errors:
d1art__ has mysterious "d" at end of atomseq
d1a3xa3 has mysterious "ke" at end of atomseq
1ebla	cifseq bug, working on fix 
1eblb	cifseq bug, working on fix 

PDB entries 1cwy & 1or3 mysteriously withdrawn for "Administrative reasons"