Thanks Dennis, the cache cleaner (OnyX) fixed the Mail.app problem. Nathan On 2/29/04 6:20 PM, "Dennis Fazio" <dfz at mac.com> wrote: > --On Wednesday, February 25, 2004 10:51 AM -0500 Nathan Chaney > <nathan_chaney at hotmail.com> wrote: > >> Help Viewer will not open from >> the Finder. When I try, the window pops up and almost immediately >> disappears. > > I had a similar problem. At first, deleting the preferences files seemed to > help, (com.apple.helpui.plist and com.apple.helpviewer.plist) but it > returned after a while. I ran one of the cache cleaners (I think I used Onyx) > and that must have done it since it's a lot more stable now, but that could > also be circumstantial, not sure. Try deleting the preferences first, then > try a cache cleaner