I also see weird behaviour of red lines on slide 1 & slide 3 if I'm saving the attached file as .ppt (red lines disappear) or .pptx (red lines forming rectangles). 

Tested using LO 4.0.3.3 with Win7 32bit

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I tested this bug again. 

Now, the situation is much better although some problems still exists.

Good things:

- The lines are possible to delete
- Saving in ODP, PPT and other formats does not change the existing shapes.

However

- There is "infinite" line on first and third slide... it's possible that these lines would never appear in LO 4.4, but they were somehow created in LO 4.0 and they still exist. Therefore, it is possible that this line would never existed if LO 4.4 was used.
- "infinite" line can be deleted, but cannot be re-sized. 


---------
* "infinite" line does not have beginning or ending :)

(In reply to Ljiljan from comment #3)
[...]
> However
> 
> - There is "infinite" line on first and third slide... it's possible that
> these lines would never appear in LO 4.4, but they were somehow created in
> LO 4.0 and they still exist. Therefore, it is possible that this line would
> never existed if LO 4.4 was used.
> - "infinite" line can be deleted, but cannot be re-sized. 

You should attach the original PPT file to test the import with current stable versions.

Note: it seems that the "infinite" lines are not lines. Indeed when you select one you get a rectangular selection. It is different when you select a line drawn in Impress.

Best regards. JBF

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Please attach the original PPT file.

Best regards. JBF

I don't have original file anymore (or if I have it I cannot find it anymore).

However, in LibreOffice 5.1. the red line can be deleted or reduced.

(In reply to Ljiljan from comment #7)
> I don't have original file anymore (or if I have it I cannot find it
> anymore).
> 
> However, in LibreOffice 5.1. the red line can be deleted or reduced.

Indeed the bad imported line can be deleted in LO 5.1 and the master.

Closing as Resolved/InsufficientData because we can't go further without the original ppt source file. Please feel free to reopen if you recover this file.

Best regards. JBF