Just ran Monolingual on my 2 iMacs G5 iSight.

Monolingual DOES NOT know some new enhancements and settings of 10.4.10. Along with wrecking my OS - down to not being able to run any of my apps, it somehow is preventing me from installing a new 10.4 over!

I've been getting the "slash - prohibition" icon sign at every restart. None of what I've tried's been working: booting with "C" from the internal drives, booting with "option" on external drives (optical and HD). Force-reading my Disk Warrior CD... Nada. Zip.

What I'm trying and see if works is: copying "System" and "Library" from the root of another identical iMac G5 over the previous installed folders.

Strange enough, Monolingual worked normally on a G3 Graphite iMac.