Use of underscores in chm filenames

Hi Everyone,
I recently came across the following as a result of a web search..
Location
http://alist.adobe.co.uk/devnet/robohelp/articles/merged_help_06.html
Potential problem highlighted with merged projects
"CHM filenames
Avoid the use of underscores, the hash symbol and suchlike in the names of the CHM files you create. They have been found to cause problems with merged Microsoft HTML help. Stick with alphanumeric characters and no spaces."
Has anyone experienced problems related to this and if so what exactly?
I am usually led to believe that underscores in a filename is a fairly safe practice???

Hi Colum,
Colum McAndrew wrote:
I'm not sure if I am the person Peter was referring to but let me add my 2p worth ;-)
I have used merged CHMs for over 10 years and in the past I have had problems with underscores in the file name. The problem I faced was that file names with underscores just did not appear in the merged project output at all. Remove the underscore and it did. That was back in the days of RHX4 so things may have changed but I've never tempted fate!
Read the RoboColum(n) for a tips, tricks and musings on the Technical Communication Suite products.
Thanks for that. To be honest I was wondering of this issue might be related to a problem I've been observing with html help projects where the compiled output files revert unprompted to the same version as the baggage files. I've been unable to see what's causing that problem and whilst searching the web I came up the Adobe pages I quoted. As this was a potentially different issue I started a separate discussion...

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