I have a new computer and my new installation of jEdit has SLOW window paints/refreshes. My old computer did not have this problem. Refreshes (on opening a new file, scrolling, etc.) snap up with my old installation.

The problem does not occur with at least some other Java apps (eg., Eclipse, SmartSVN) suggesting (but of course not proving) that the problem is not with the JRE. The difference between the two computers does seem to show up with ArgoUML, but I haven't used it enough to know that for sure.

The old compter is a Lenovo T61, the new a Lenovo T400. Both computers are Windows XP, all service packs and other Windows update fixes installed.

Both jEdit installations are v. 4.3pre16. I just upgraded the new computer JRE from 1.6.0, update 11 to update 12. IIRC, the old computer is at update 11.

I tried copying both by ApplicatonData/.jEdit (or, in Micrsoft lingo, ApplicatonData\.jedit) and my Pogram Files/jEdit directories from the old computer to the new computer. It didn't help.

My current Utilities->Global Options->Text Area options include:
Electric (auto scroll) borders [whatever that is]: Off.
Anti Aliased smooth text: none.
Fractional font metrics (for better smooth text display): Off.

At some point, the slowness problem mysteriously (apparently not in response to a settings change) disappeared. However, the slowness reappeared on my next reboot. (I usually try to avoid reboots, preferring stanbys and hibernates. However, this preference is ofeten foiled by the fact that it is Windows.) Could this perhaps suggest that the some setting (fractional font metrics, perhaps) is often ignored???

Any ideas would be greatly appreciated.