http://bugs.winehq.org/show_bug.cgi?id=23092
--- Comment #1 from billstei billstei@hbci.com 2010-06-09 11:47:37 --- An interesting workaround: Find a (nearby) FL Browser link that does work and right click it, but be careful not to select anything in the pop-up menu. While the (unrelated) pop-up menu is still open, left or right click on the non-working long path/folder/file name, and it will work as expected (for that click only).
This would seem to suggest that there is a race condition, rather than a text length processing problem.