Google N-gram Corpus Counts
╭─ーーーーー─┬────────┬───────╮
│ 恨めしい　 │ 53,553 │ 76.5% │
│ 怨めしい　 │    991 │  1.4% │ - rK (daijr/s, koj, etc.)
│ 怨しい　　 │     26 │  0.0% │ - io to sK
│ 恨しい　　 │      0 │  0.0% │ - io to sK
│ うらめしい │ 15,414 │ 22.0% │
├─ーーーーー─┼────────┼───────┤
│ 恨めしく　 │ 33,817 │ 82.5% │
│ 怨めしく　 │    398 │  1.0% │
│ 恨しく　　 │     33 │  0.1% │
│ 怨しく　　 │      0 │  0.0% │
│ うらめしく │  6,765 │ 16.5% │
╰─ーーーーー─┴────────┴───────╯

@@ -8,0 +9 @@
+<ke_inf>&rK;</ke_inf>
@@ -12 +13 @@
-<ke_inf>&io;</ke_inf>
+<ke_inf>&sK;</ke_inf>
@@ -16 +17 @@
-<ke_inf>&io;</ke_inf>
+<ke_inf>&sK;</ke_inf>

google

got this previously: (I think I might have entered the ok tag in the kanji field)

We're sorry, but an error occured while processing your request. It has resulted in an alarm condition in the EDRDG Worldwide Network Operations Center, and a large number of people are now scurrying around trying to fix the problem you caused. We hope you're happy.

Traceback (most recent call last):
  File "/usr/local/apache2/jmdictdb/cgi-bin/edconf.py", line 317, in <module>
    main (args, opts)
  File "/usr/local/apache2/jmdictdb/cgi-bin/edconf.py", line 97, in main
    entr, perrs = parse (intxt)
  File "/usr/local/apache2/jmdictdb/cgi-bin/edconf.py", line 297, in parse
    entr = parser.parse (krstext, lexer=lexer, tracking=True)
  File "/usr/local/lib/python2.6/site-packages/ply/yacc.py", line 263, in parse
    return self.parseopt(input,lexer,debug,tracking,tokenfunc)
  File "/usr/local/lib/python2.6/site-packages/ply/yacc.py", line 710, in parseopt
    p.callable(pslice)
  File "../lib/jelparse.py", line 102, in p_kanjitem_2
    err = bld_kanj (kanj, p[2])
  File "../lib/jelparse.py", line 720, in bld_kanj
    if not v: perror ("Unknown kanji tag '%s'" % t[0])
  File "../lib/jelparse.py", line 413, in perror
    raise ValueError ("Unable to get lexer error position.  "
ValueError: Unable to get lexer error position.  Was parser called with tracking=True?

@@ -9,0 +9,8 @@
+</k_ele>
+<k_ele>
+<keb>怨しい</keb>
+<ke_inf>&io;</ke_inf>
+</k_ele>
+<k_ele>
+<keb>恨しい</keb>
+<ke_inf>&io;</ke_inf>