This is not actually an error. It is just a difference in coordinate systems.
GFF (and GBrowse and Ensembl) use an inclusive index-based system: The first base of the sequence is at position 1, the next is at position 2, etc. Your annotation starts at index xxx199 and ends at index xxx203, for a total of 5 bases.
IGB (and BED files and the UCSC browser) use an inter-base coordinate...
2009-09-15 21:21:39 UTC in GenoViz
