I'm having a problem with a typing tutor called TypingMaster (the full/registered version). When you install, you can choose between a java VM which you already have installed, and a dedicated VM which it will install for you. Originally, I took the second option, because I didn't have j2sdk installed. However, I experienced what seems to be a fairly huge bug which renders the test section of the tutor unusable (I've contacted their support re this -- awaiting reply), so I decided to download and install j2sdk1.4, and re-installed TypingMaster, this time pointing it to the new java installation. Everything works now, but there's an *extremely* distracting flicker on the countdown timer as you carry out each exercise, which didn't happen with the dedicated java VM. Is this just bad programming, or can I somehow tweak my j2sdk installation and/or any other settings to help prevent this problem?

I don't know what other information would be helpful. I'm using nvidia's own graphics driver to support a geforce 4 MX440. I don't experience any display-related problems.

One other completely unrelated question. If I try to do anything X-related as root, I get an error message. For instance, suppose I try to turn off my scroll-lock LED as root with:

$ xset -led 3

I get this error.

Xlib: connection to ":0.0" refused by server
Xlib: Invalid XDM-AUTHORIZATION-1 key (failed key comparison)
xset: unable to open display ":0.0"

What's going on there?

Thanks

Ian

This could probably happen from incomplete code, or just not finished code,
also, maybe the refresh of the app is meant to run alot higher or lower than the current H-V refresh you have set.

this could also happen if your horiz or vertical refresh is signifagantly different. With some apps.
Probably the code, check for errata or patches.