Known issue: Incomplete/corrupted downloads with zip streaming (v4.5.1.0)

There is a problem in zip streaming feature (introduced in v4.5) which may occur when downloading large files due to a timeout issue. Note that the problem does not occur with single file downloads. Zip streaming is active only when multiple items are downloaded or "Download As Zip" action is used explicitly.

As a workaround open Web.config file and find httpRuntime element and add executionTimeout property like this:

<httpRuntime maxRequestLength="2096053"  executionTimeout="3600" />

Next release will include the fix so that the above workaround will not be required.
We are also currently working on some improvements in zip streaming feature such as:
- Minimizing usage of server resources during streaming.
- Estimating size of the zip to be generated beforehand so that browser's download dialog displays correct progress information. However, this improvement may not be possible on Mac platform when using zip file format.
- Fixing the problem of corrupted zips on Mac platform (especially with Archive Utility) which occurs even with small files.

This issue is fixed and the mentioned improvements above have been implemented in v4.5.9 which is released today:
Fix 2 for FileVista v4.5 (v4.5.9)