I noticed the same problem with my Japanese Vista 64 bit installation of Stackz 7 RC 6 with the standard english Edict file. I couldn't search on Kanji, only Hiragana. And even then the results were... strange. After I reindexed, which wrote over the index that came with the Edict file, could I search by Kanji with clean, properly formatted results. I guess the moral of this story is to index your dictionary files just in case. I know you don't index, but it seems like that's the only way. On my core2duo machine it took about 20 seconds to completely index the file.