When Dave loses its settings
At work I use DAVE by Thursby Software to improve my Mac’s compatibility with the Windows network. Without it, I can connect to the network, but things are never quite right, and Dave just seems
Continue readingCategory: Troubleshooting
“Certificate couldn’t be read” errors in Mail.app
Corporate mail servers often used SSL certificates, and sometimes these certificates expire. At that point you may start getting “Certificate couldn’t be read” errors in Apple’s Mail.app.
According to Apple, permanently accepting a self-signed SSL certificate may fix the problem.
- Click the Show Certificate button in the error message.
- Hold down the option key and drag the certificate icon out of the error window to your desktop.
- Double-click the certificate icon on the desktop, and choose X.509 Anchors from the pop-up menu. Click Add. You must have permission to administer the computer for this procedure to work.
Safari rejects expired certificate or can’t verify certificate
If Safari gives you the following error “Client certificate rejected” and shows you a white page, try this. Open Keychain Access, find the expired certificate and delete it. There may be two certificates with the
Continue readingJava error message: Several Java Virtual Machines running in the same process
When attempting to launch browser-based SCORM courseware, people have been getting the error: “Several Java Virtual Machines running in the same process caused an error”
Apparently many people have this issue since upgrading java. I came across it because it can affect the delivery of elearning courses if the learning management system relies on a java-applet based scorm adaptor to communicate.
Continue readingWhen colspan property doesn’t appear to work in Firefox or Safari
When building web applications I often use display styles to show or hide divs or table rows as needed. On one project, I found that the “colspan” property did not seem to work in Firefox or Safari. This was because I had incorrectly used display:block to style the TR element, instead of display:table-row. A demo is below, and the code follows.
Continue readingSafari won’t launch a Perception Quiz from the LMS, when all other browsers will
Our SumTotal (Docent) 6.5 learning management system uses SCORM to launch learning activities and quizzes. We had a case where several Perception Quizzes would not launch using Safari, but any other browser did launch them.
Continue readingFan Noise after upgrading to OS X 10.4.7
Every so often, I show up in the office to see that my year-old G5 tower has decided to emulate a jet engine. Overnight, the fans rev up to the maximum, and stay that way
Continue readingiTunes won’t recognize music folder on another machine
I recently got a new Mac, and wanted to use the iTunes music folder I had been using with the old one. The iTunes Music folder is on a firewire drive, so I plugged that
Continue readingWacom tablet jittery after moving to new machine
I recently moved my Wacom tablet to my new G5. I installed the very latest driver, which is compatible with Tiger. When I tried to move the pen around the tablet, it was so jumpy
Continue readingWacom tablet stops functioning
On my Windows 2000 workstation, occasionally, the tablet just stops working. It seems that this usually happens when the mouse (which is also still connected) has been moved accidentally. However sometimes it seems to just
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