Sorry if this is a false alarm and a local problem;
EDIT;Sorry, this looks like it was my choice of installation folder that caused the screen misbehaving part of this error
Just installed 0018 a sketch that compiled in 0017 no longer compiles, with the error;
20: error: Keypad.h: No such file or directory In function 'void loop()':
Keypad.h and a couple of other libraries are no longer displayed in the drop down list at SKETCH / IMPORT LIBRARYS although the files are in the hardware/library folder.
Also, going from the default size window on opening to full screen (twin screen setup) the compile open, save close icons etc vanish!
Someone had a similar problem on 0017, where the IDE tiled across the screen, that was thought to be a java problem... Before I start messing with the java, can anyone else see if this happens to them with 0018 and a sketch that includes keypad.h?
The libraries installed with 17 do not re-install themselves with 18. You need to do that. On 18, they go in the libraries folder, rather than the hardware/libraries folder.
I tried the full screen thing. My icons did not go away, but I restrict windows to a single screen.
Is there a suggested / preferable way of going from one version to the next version ....
This depends on the operating system I guess.
I use linux and the IDE download automatically unpacks in a directory that has the version-number in it. Arduino 0018 installs into arduino-0018.
If you want to keep old versions around I suggest you use the scheme arduino/arduino-
The only problem with deleting older versions are third party libraries that are local to a specific version. Copy them to the new sketchbook/libraries dir to make them available across versions.