2.6.7 is the latest stable, please make sure you are using 2.6.7 which includes some fixes.
OK, so if I understand you correctly, no rules are being triggered in your case, is that correct? Does the test case generate a log message on your system?https://www.atomicorp.com/wiki/index.ph ... are_loaded
Do you have any rules disabled, or any custom modifications to your rules?
So we just setup owncloud 4.0.6 on a test system, and using the iphone and linux clients uploaded and synced a bunch of docs and photos and didnt have any issues. What exactly are you doing with owncloud?
We'll get the android client setup in a moment to see if it works, but so far owncloud seems to be working fine with the rules out of the box.
In the mean time, can you run a single test on your system with your android client with modsecurity in debug mode (please dont do anything else on the server when you do this, it will generate a lot of data we dont need), and then send us the modsec-debug.log file. Please also send your modsec configuration.
Add these lines to your modsec config to setup debug mode.
And then disable these once you are done, debug mode will slow down apache considerably.