For my own curiosity, I installed/removed an item to see when it broke and came up with the numbers below. Apparently, after 9 uninstalls, the condition of the item becomes "broken", however you can still install it and it still applies its effects when you do.

Condition % - Condition Description
100.0 - perfect
90.0 - excellent
81.0 - very good
72.9 - good
65.6 - above average
59.0 - average
53.1 - fair
47.8 - poor
43.0 - very poor
38.7 - broken (still works)
34.9 - broken

so an installed weapon that is broke still inflicts same amount of damage?

Since there is no option to repair until it is fully damaged, that won't work as things are.

Just fyi, this issue still exists.

because it's not a bug, it's just how he chose to name the 2nd to last condition (though he should probably call it "Nearly Broken")
by the way, your condition %'s are wrong, it loses a flat 10% each uninstall
100% = Perfect
90% = Excellent
80% = Very Good
70% = Good
60% = Above Average
50% = Average
40% = Fair
30% = Poor
20% = Very Poor
10% = Broken (but still installable, possibly needs to be renamed "Nearly Broken" ??)
0% = Broken (and needs Repair)

How do you know that?

Its pretty Obvious, Hes not fixing it because its what its supposed to be

Hm, I see what you mean. I was thinking along the lines of how artifacts multiply bonuses..For example, using a Neural Interface and a RSL Memory Implant results in an increase of xp gain by 26.5%, not 25%. Ah well, just wanted to do my part to make the game better.