Some revisions are missing from the created revision SQL file (for Wiktionary-DE)

[daxenberger]

Originally reported on Google Code with ID 105

What steps will reproduce the problem?
1. Create database config using ConfigGUI (default values, use SQL export, include
all namespaces)
2. Run the DiffTool w/ German Wiktionary revision dump (can be provided)
3. Import the created SQL dump.

What is the expected output? What do you see instead?
http://de.wiktionary.org/w/index.php?title=MediaWiki:Mainpage&action=history shows
14 revisions.
In the database are only 12. The revisions RevisionID=2519 and 14994 are missing for
ArticleID=7. About 20,000 revisions are affected in total.

What version of the product are you using? On what operating system?
v0.9.2; linux

Please provide any additional information below.
It seems like revisions that do not change the length of the text are missing.

Reported by chmeyer.de on 2012-11-01 14:23:07

[daxenberger]

According to my experiments, 25,452 revisions are missing. The total number of revisions
that do not change the text length is 106,030 - this includes edits that do not change
the text at all AND edits that do not change the text length. Unfortunately, I'm not
able to count the former, but it is likely that they account for the 25,452(?)

Reported by chmeyer.de on 2012-11-01 14:40:11