Steps to reproduce:
1. Start gnucash
2. Create new file
3. Import QIF ...


Stack trace:
Backtrace:
In unknown file:
   ?:  0* [qif-file:parse-fields #]
In /usr/share/gnucash/scm/qif-import/qif-file.scm:
 505:  1* (let* (# # # #) (and # # # ...) (cond # #))
 520:  2* (and # # # ...)
 574:  3* [parse-field #<procedure qif-xtn:action #> ...]
 628:  4* [for-each #<procedure #f (obj)> (#)]
In unknown file:
   ?:  5* [#<procedure #f #> #]
In /usr/share/gnucash/scm/qif-import/qif-file.scm:
 630:  6* (let* ((unparsed #)) (if (and unparsed #) (setter obj #)))
 631:  7  (if (and unparsed (string? unparsed)) (setter obj (parser unparsed)))
 632:  8  [qif-xtn:set-action! # ...
 632:  9*  [qif-parse:parse-action-field "BuyX"]
In /usr/share/gnucash/scm/qif-import/qif-parse.scm:
 190: 10   (if read-value (let* (#) (case action-symbol # # ...)) #f)
     ...
 192: 11   (case action-symbol ((buy kauf) (quote buy)) ...)

/usr/share/gnucash/scm/qif-import/qif-parse.scm:192:9: In procedure memoization in expression (case action-symbol (# #) ...):
/usr/share/gnucash/scm/qif-import/qif-parse.scm:192:9: In file "/usr/share/gnucash/scm/qif-import/qif-parse.scm", line 191: Duplicate case label aktzu in expression (case action-symbol ((buy kauf) (quote buy)) ((buyx kaufx) (quote buyx)) ((cglong kapgew) (quote cglong)) ((cglongx kapgewx) (quote cglongx)) ((cgmid) (quote cgmid)) ((cgmidx) (quote cgmidx)) ((cgshort k.gewsp) (quote cgshort)) ((cgshortx k.gewspx) (quote cgshortx)) ...).



Other information:
Here's the QIF file:

!Account
NCDs
DCerificates of Deposit
TPort
B0.00
^
!Type:Invst
D11/25/96
NBuyX
YSpencer 4 month CD
I100,000
Q1
T100,000.00
L[Spencer Chkg]
$100,000.00
^