TIMELINE: problems when displayinf a timeline vertically

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What steps will reproduce the problem?
1.create a new timeline with two bands (like in the step-by-step
2.the created timeline shoud have the "vertical" settings, e.g: tl = 
Timeline.create(document.getElementById("my-timeline"), 
bandInfos,Timeline.VERTICAL);

3.The use events are from the exampl.xml

What is the expected output? What do you see instead?
I dont see my events when scrolling, to be more  accurate, I sometimes see 
one of them just for a miliseconds and then it disappears

What version of the product are you using? On what operating system?
seen on both 2.3.0,2.3.1

Please provide any additional information below.
This issue was laso mentioned in this thread:
http://groups.google.com/group/simile-
widgets/browse_thread/thread/0ccbf3df564e6eec?hl=en

Original issue reported on code.google.com by oeg...@gmail.com on 17 Mar 2009 at 12:24

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Original comment by stefano.mazzocchi@gmail.com on 25 Mar 2009 at 7:01

• Added labels: Project-Timeline

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Original comment by stefano.mazzocchi@gmail.com on 25 Mar 2009 at 7:16

• Changed title: TIMELINE: problems when displayinf a timeline vertically

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Argh! This problem is truly in !
The same timeline.HORIZONTAL displaying correctly events , it simply don't 
display
any event from the same eventSource if created with .VERTICAL !

:( So we can't use the VERTICAL timeline asset ?

Original comment by litobyte...@gmail.com on 3 Aug 2009 at 8:22

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any update or solution for this?

Original comment by hillrie...@gmail.com on 21 Nov 2011 at 8:07