Update to the latest stable release. The main changes since the last packaged release are:

• Better scroll wheel support;
• Symbols sidebar: Correctly remember additional symbols;
• Unicode chars can now be input using the alt+x method;
• Improved stability of the communication with maxima;
• Many corrections to the display routines;
• Corrected a few visual glitches of the worksheet;
• More tutorials describing a few of maxima's features;
• among others.