In 1.3.4 new files counter reaches 324 (sometimes 325) and stops, so do the progress bar. Cache files counter still increasing but no further duplicates found. Cache cleanup and reinstall does not help. (1.3.3 works fine on the same folder)
Statusbar:
0 duplicate(s) | Cache: 60 | New: 60/1125
1 duplicate(s) | Cache: 135 | New: 135/2615
1 duplicate(s) | Cache: 265 | New: 265/8126
1 duplicate(s) | Cache: 380 | New: 324/8388
2 duplicate(s) | Cache: 490 | New: 324/9194
2 duplicate(s) | Cache: 704 | New: 324/10684
2 duplicate(s) | Cache: 1627 | New: 324/14285
...and so on
With same settings 1.3.3 will give more than 2 duplicates on 1627 files.