Hi Dan,
I have the trial version 2.5.6. I faced the issue in both iOS 6 and 7. But I made it work by using the this delegate,
Its just leaving space for 4 digits in the y axis. As for the reproducing, try using a y axis value of 374 in a column chart, that's when I was getting this problem.
- (NSString *)sChart:(ShinobiChart *)chart longestLabelStringOnAxis:(SChartAxis *)axis {
return @"####";
}