OO is displaying unicode directional characters (LRE LRO PDF ...)

[Micha Feigin <michf@post.tau.ac.il>]

I am having a problem with OO that it is displaying directional unicode
characters such as LRM and RLM which are shown as small arrows and LRO, LRE and
PDF which are converted to spaces.

With red hat 1.1 version these are hidden properly as the should be.

These are supposed to be non-printing charachters.

Any idea on how to hide them ? (is this a bug with the debian version?)