If a line is broken just before a link, the link text is moved to the next line, but the link area stays in the same line. This only happens if the overflow is very small (more or less 1 character), and there is some text right after the link. I will attach a XSLFO file that reproduces the behaviour in version 0.20.5rc2.
Created attachment 5403 [details] XSLFO file that reproduces the problem.
Created attachment 5404 [details] Just in case there are font variations, PDF for the previous attachement (5403)
Bug fixed in latest Trunk (rev 584703), and probably in FOP 0.94
batch transition pre-FOP1.0 resolved+fixed bugs to closed+fixed