From Bugzilla Helper: User-Agent: Mozilla/5.0 (Macintosh; N; PPC; en-US; m18) Gecko/20000901 BuildID: 2000090110 Looks like GUI error redrawing list of items in left-hand list. Reproducible: Sometimes Steps to Reproduce: 1.Expand items in preferences window list so they exceed window length 2.Scroll down through last item 3.Attempt to select items from list Actual Results: The last item in the list (Debug->Networking) is often duplicated. Thereafter, selecting any item will have problems; i.e. a different item is actually activated. The window becomes unusually slow to respond. Pressing the Cancel button in an affected Preferences window allows to program to recover.

Yup, I reproduced this on Mac 2000-09-03-08 on OS9, using the Classic theme. Seems to be a conflict between the scrollbar up-down arrow buttons and the tree(?) expansion feature.

sounds like a tree bug... familiar,too --does this bug already exist?

confirming. For me, the key is to collapse all the branches, then expand one by one from top to bottom, then scroll up then down -- some rows are not repainted, leaving false labels. This is another in a series of tree bugs that have been cropping up lately (or again as the case may be). Nom. nsbeta3, but with only half a heart -- the effect is cosmetic only in this case. However, I expect that other fixes may cure this as well.

nsbeta3-/future, unless anyone can reproduce some bad consequence for this.

I do not see the bug in M18 nightly build 200009520. Could Terrence Tan or someone else confirm that they no longer see it either?

I'm still seeing this behaviour on build 2000-09-15-20 on Mac OS 9, using both Classic and Modern themes. Based on that, I can't confirm that this bug is fixed. I'd like to know if this bug is Mac-only, or XP.

Fixed by 57139.

awaiting branch checking for bug 57139...