Patch extracted from maxima git repository.

--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,19 @@
+2012-03-25 Yasuaki Honda <yasuaki.honda@gmail.com>
+	* version 1.03
+	* A new command "reinit-imaxima" is added. This command reset the
+	communication status of Emacs Lisp and Maxima. When imaxima does
+	not respond to any input, this command will help to resolve such
+	situation.
+
+2011-10-02 Yasuaki Honda <yasuaki.honda@gmail.com>
+	* version 1.01
+	* An old workaround code for tex prevented imaxima on Mac OS X
+	Lion from working. This is related to the placing of the temporary
+	file directory and the name of the file path containing the
+	character "_". This is fixed in this version.
+	* Special treatment of greek character gamma is removed from
+	imaxima.el and commited to maxima mactex.lisp.
+
 2009-02-07 Yasuaki Honda <yasuaki.honda@gmail.com>
 	* As for inline graph, if the emacs buffer window is too small for
 	the generated graph image, the graph is not displayed, but a file
--- a/imaxima-autoconf-variables.el
+++ b/imaxima-autoconf-variables.el
@@ -19,6 +19,6 @@
 ;; Software Foundation, Inc., 59 Temple Place, Suite 330, Boston,
 ;; MA 02111-1307 USA
 (defconst *imaxima-autoconf-package* "imaxima-imath")
-(defconst *imaxima-autoconf-version* "1.0")
+(defconst *imaxima-autoconf-version* "1.03")
 
 (provide 'imaxima-autoconf-variables)
--- a/imaxima.el
+++ b/imaxima.el
@@ -420,6 +420,17 @@
   (message "%s %s" *imaxima-autoconf-package* *imaxima-autoconf-version*))
 
 ;;
+;; Reset
+;;
+
+(defun reinit-imaxima ()
+  "Re-initialize imaxima"
+  (interactive)
+  (setq imaxima-filter-running nil
+    imaxima-output nil
+    continuation nil))
+
+;;
 ;; Geometry
 ;;
 
@@ -1174,6 +1185,7 @@
 	  (switch-to-buffer imaxima-buffer)
 	(set-buffer imaxima-buffer))
       (return-from imaxima t)))
+  (reinit-imaxima)
   (unless (imaxima-image-type-available-p imaxima-image-type)
     (error "Your version of Emacs does not support the image type %s"
 	   imaxima-image-type))
@@ -1183,9 +1195,7 @@
   (setq imaxima-file-counter 0)
   (make-directory
    (setq imaxima-tmp-subdir
-	 ;; For some reason TeX doesn't grok underscores in file names
-	 (imaxima-subst-char-in-string ?_ ?=
-	    (make-temp-name (expand-file-name "imaxima" imaxima-tmp-dir)))))
+	 (make-temp-name (expand-file-name "imaxima" imaxima-tmp-dir))) t)
   (set-file-modes imaxima-tmp-subdir 448) ; 700 in octal
   (let ((process-connection-type process-connection-type-flag))
     (if imaxima-use-maxima-mode-flag
--- a/imaxima.lisp
+++ b/imaxima.lisp
@@ -109,9 +109,9 @@
 ;;; SBCL.
 ;;; by yasuaki honda
 #-sbcl
-(if (not (fboundp (find-symbol "PRINT-INVERT-CASE" :maxima)))
-    (defun print-invert-case (obj)
-      (princ-to-string obj)))
+(unless (fboundp 'maxima::print-invert-case)
+  (defun print-invert-case (obj)
+    (princ-to-string obj)))
 
 (defun print-case-sensitive (obj)
   (if obj
@@ -126,7 +126,7 @@
 
 (defun main-prompt ()
   (format () (concatenate 'string (string (code-char 3)) "(~A~D) " (string (code-char 4)))
-    (STRIPDOLLAR (print-case-sensitive $inchar)) $linenum))
+    (stripdollar (print-case-sensitive $inchar)) $linenum))
 
 (defun break-dbm-loop (at)
   (let* (
@@ -142,7 +142,7 @@
     (declare (special *mread-prompt* ))
     (and (consp at) (set-env at))
     (cond ((null at)
-	   ($frame 0 nil)))
+	   (break-frame 0 nil)))
     (catch 'step-continue
       (catch *quit-tag*
 	(unwind-protect
@@ -672,9 +672,12 @@
     (setq res (apply (symbol-function '$draw)
 		     (append
 		      `(
-			((mequal simp) $terminal $eps)
-			((mequal simp) $pic_width ,($first $wxplot_size))
-			((mequal simp) $pic_height ,($second $wxplot_size))
+			((mequal simp) $terminal $eps_color)
+                        ((mequal simp) $dimensions
+                                       ((mlist simp)
+                                        ;; convert points to 1/100 of cm
+                                        ,(* 3.53 ($first $wxplot_size))
+                                        ,(* 3.53 ($second $wxplot_size))))
 			((mequal simp) $file_name ,filename))
 		      args)))
     ($ldisp `((wxxmltag simp) ,(format nil "~a.eps" filename) "img"))
--- a/imaxima.texi
+++ b/imaxima.texi
@@ -223,6 +223,15 @@
 information when you want to make bug reports.
 @end defun
 
+@defun reinit-imaxima
+Initialize the imaxima program. Sometimes you may encounter situations
+where imaxima does not repond to your input. This is caused by the
+inconsistency between Emacs Lisp and Maxima. Such situations can be
+resolved by using this command. After calling this command from the
+Emacs mini buffer, you should type simple Maxima expression such as
+1+2; to ensure that the imaxima does respond to you now.
+@end defun
+
 @node Inline Graph
 @chapter Inline Graph