SamePlace's sidebar doesn't show with enabled Jetpack 0.4

After installation of Jetpack v 0.4 extension from Mozilla Labs (https://jetpack.mozillalabs.com/), SamePlace's sidebar doesn't show neither by pressing hotkey (F9), nor by pressing button on toolbar. Then Jetpack disabled, everything is going fine.

From Error Console:
1) "Error: [Exception... "Component returned failure code: 0x80004005 (NS_ERROR_FAILURE) [nsIWebNavigation.sessionHistory]" nsresult: "0x80004005 (NS_ERROR_FAILURE)" location: "JS frame :: chrome://global/content/bindings/browser.xml :: :: line 641" data: no]
Source: chrome://global/content/bindings/browser.xml
String: 647"
2) "Error: uncaught exception: [Exception... "Component returned failure code: 0x80004005 (NS_ERROR_FAILURE) [nsIDOMXULDocument.width]" nsresult: "0x80004005 (NS_ERROR_FAILURE)" location: "JS frame :: chrome://sameplace/content/contacts/contacts.js :: resizedView :: line 655" data: no]"
3) "Error: $("#conversations").contentDocument is undefined
Source: chrome://sameplace/content/conversations/conversations_overlay_sidebar_impl.js
String: 84"

SP: 0.9.4.2009063011
x4m: 0.7.2.2009063010