## Known Problems Open, Import and Save As (and Cut, Copy and Paste of text to other programs) only work when ImageJ is running as an application or running as an applet using Internet Explorer 4 with http://rsb.info.nih.gov set up as a "Trusted sites zone" or using Sun's HotJava browser with the unsigned applet security preference set to "Medium". Cut, Copy and Paste only work with rectangular selections. Support for RGB images with alpha channel (transparency) data is flaky. The Save command is an alias for "Save as Tiff". Compressed TIFF files and TIFF files with discontinuous image data can't be opened. When running as an applet, the "Fonts" and "Adjust Contrast" windows are not automatically closed when you quit ImageJ. ### JVM Specific Problems JDK 1.2 (aka Java 2) draws images slowly (refer to bug 4185726). It also has memory management problems (try opening and closing image windows with the "Memory Monitor" running). Use JDK 1.1.7 instead. MRJ 2.0 (Mac) has many problems. Use MRJ 2.1 instead. IE 4 (PC) is slower than IE 3 (!!), keyboard shortcuts are not displayed in menus, it flickers when scrolling images and moving ROIs, and the font used in the "ImageJ" window is not monospaced. IE 4 (Mac) has status bar and memory management problems, the toolbar flickers, and function keys don't work.

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