Mylar supports Eclipse 3.1 final and Eclipse 3.2 milestone releases. For the time being Mylar only runs in a Java 5 VM, but we are exploring support for JDK 1.4 VMs.
Bug 102663 Multiple workbench windows are not supported and Mylar will not work properly if you have more than one window open.
Bug 102848 You can only set one bugzilla repository per workspace.
Bug 109314 Folding must be toggled off in order to view all the matches for "mark occurrences". This is not a Mylar-specific limitation but is more noticeable when Automatic Folding is enabled.
As you work and elements become landmarks (bold decoration), and these elements populate the Active Search and Active Hierarchy views. To force an element to populate the views manually make it a landmark by right-clicking or hitting Ctrl+Alt+Shift+Up Arrow.