eboard's game save format is not valid PGN and thus
confuses other PGN-reading programs such as xboard. The
problem is these two lines:
I would suggest using PGN tags for this information.
The 'clue' information could be replaced by the PGN
'Termination' tag. For the clock information, you could
simply introduce a 'Clock' tag, since the use of
nonstandard tags is permitted by the PGN standard so
long as they conform to the standard syntax.
I would categorise this bug as relatively serious
since, as eboard does not make it possible at the
moment to carry out computer analysis of stored games,
it is necessary to use other programs such as xboard
for this purpose.