chess.com diagrams are buggy in the forums for me... is it that way for anyone else?

certainly broken... investigating...

Erik, I think the problem may have been with the PGN I was using... I recently got another diagram to load properly.

Hmm . . .

Edit: Working fine for me . . .

can you be more specific?

Your hardware. SO Windows xp? vista? 7? MAC *Nix? Browser? Internet explorer firefox safari etc. That way the staff can try and help you better.

The phrase is "fault tolerance" - chess.com postings are not fault-tolerant, meaning if there is any error in the PGN file, specially the FEN string you are including, it will not post properly. Here is a copy of a posting I made earlier (I had to copy because I couldn't link to the exact posting):

From wikii:

"A FEN record contains six fields. The separator between fields is a space. The fields are:

1. Piece placement (from white's perspective). Each rank is described, starting with rank 8 and ending with rank 1; within each rank, the contents of each square are described from file a through file h. Following the Standard Algebraic Notation (SAN), each piece is identified by a single letter taken from the standard English names (pawn = "P", knight = "N", bishop = "B", rook = "R", queen = "Q" and king = "K")^[1]. White pieces are designated using upper-case letters ("PNBRQK") while Black take lowercase ("pnbrqk"). Blank squares are noted using digits 1 through 8 (the number of blank squares), and "/" separate ranks.
2. Active color. "w" means white moves next, "b" means black.
3. Castling availability. If neither side can castle, this is "–". Otherwise, this has one or more letters: "K" (White can castle kingside), "Q" (White can castle queenside), "k" (Black can castle kingside), and/or "q" (Black can castle queenside). If both can castle both sides, it is "KQkq"
4. En passant target square in algebraic notation. If there's no en passant target square, this is "–". If a pawn has just made a 2-square move, this is the position "behind" the pawn.
5. Halfmove clock: This is the number of halfmoves since the last pawn advance or capture. This is used to determine if a draw can be claimed under the fifty-move rule. Usually 0
6. Fullmove number: The number of the full move. It starts at 1, and is incremented after Black's move."

There should be a space after dot in whites' move "1.  d4" not "1.d4", but no space for black's starting move "3...d4".

when inputting FEN record in PGN, the format is

[FEN "FEN string"] note: no "=" sign: [FEN ="FEN string"] is wrong.

Incomplete/incorrect strings will not work in chess.com postings.

Also one known bug is the FEN string won't work if you include all the moves from beginning. e.g., if start is black's 38th move, your move should start with 38... not 1. e4 etc.