Here are two OS X 10.8 bugs for your collection. Both of these critters result in crashes of the affected applications.
Network proxy bug
Network’s Proxies options: To avoid crashes, make sure the top two configurations are not enabled.
Theres good news and theres bad news here. The good news is that this bug affects only a minority of users — those that enable network proxies (as done by going to Network System Preferences, clicking the Advanced button and selecting Proxies). The bad news is that, if the bug affects you, its serious: Several different third-party programs are likely to crash on launch.
The author of MarsEdit explains:
The issue is related specifically to the Auto Proxy Discovery and Automatic Proxy Configuration settings in Network preferences. If you have one of these options checked, you are very likely to crash in MarsEdit, Safari, Tweetbot, and any number of other apps that rely on Apples networking libraries.
Another such application is NetNewsWire. Its developers write:
We believe the instability is affecting a few percent of our users, but its occurring too deep in the bowels of the networking stack to be fixable on our end, leaving us dependent on Apple to correct it in 10.8.1.
Also chiming in on this matter is AgileBits David Chartier, writing about how the bug affects Safari and 1Password: If you are experiencing Safari 6 crashing under Mountain Lion with our 1Password extension installed&it appears to be caused by a problem with proxy settings under Mountain Lion.
The agreed-upon recommended work-aroundat least for nowis to disable/uncheck Networks Auto Proxy Discovery and Automatic Proxy Configuration options. If you cant turn them off, because your network requires that these options remain enabled, you wont be able to safely use the affected apps until Apple supplies the needed remedy.
Snapz Pro bug
To avoid having Snapz Pro crash, don’t select Objects.Another program with difficulties taming Mountain Lion is Ambrosias Softwares Snapz Pro X, a screen-capture utility. The developers state: The current version of Snapz Pro X is not fully compatible with Mountain Lion. The main symptom is that selecting the utilitys Objects& option will cause Snapz to crash. In addition, Mac Audio capture will not work. The KEXT used for Mac Audio capture should be uninstalled automatically by the OS. If used, it will result in a kernel panic.
These are significant problems for Snapz Pro users. In my case, I use Objects for about 75 percent of the screen captures that I do. I was glad to read that the developers hope to have a Mountain Lion compatible update out as soon as possible. Im counting the days.