1. To help you with your crash I need to see the crash details. Presumably it's a #132 error, I need a copy of the entire thing. Paste it to privatepaste.com and give me the URL or paste ID

2. To determine whether your "Alt" issue is caused by changes you've made to your ISBoxer config, I need to see it. HOWTO: Share your configuration for better support

Generally, though, this problem may typically be caused by having the "Hold any Keystroke Actions while the Hotkey is held" option enabled on your FTL-enabled Mapped Key or the Key Map that contains them. If you made a new Key Map to put your custom Mapped Keys in, you might need to disable this option on the new Key Map.