PDB2PQR 1.2.0 (2007-01)
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New features
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* Added autoconf support for pdb2pka directory.
* Added new support for passing in a single ligand residue in MOL2 format via the --ligand command.  Also available from the web server (with link to PRODRG for unsupported ligands).
* Numerous additions to examples directory (see examples/index.html) and update to User Guide.

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Bug fixes
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* Fixed charge assignment error when dealing with LYN in AMBER.
* Fixed crash when a chain has a single amino acid residue.  The code now reports the offending chain and residue before exiting. 
* Fixed hydrogen optimization bug where waters with no nearby atoms at certain orientations caused missing hydrogens.

