[OWW-Discuss] Image problems appear to be under control

[Bill Flanagan]

I ran down the image problem, or at least AN image problem, that I mentioned
in a previous message. The problem was in the MediaWiki 1.12 Mime table: it
used the wrong mime type to attempt to process Microsoft BMP files. The type
has been changed. The fix works.

One point to consider in managing images within OWW. If you have a JPEG
image and save it with a PNG filename, MediaWiki will accept the file. But,
upon uploading it, MediaWiki attempts to guess the format of the image.
Therefore, the file will have a ".jpg" file extension, but will now have a
stored file type of "PNG". When you open the file, MediaWiki will invoke the
JPEG handler for it rather than the PNG file handler. Bottom line: a
filename is a label and not a manifest of the file's contents.

Steve Koch also sent an example where a large PNG file (over 2 mb) was not
shown as a thumbnail. I'm hunting down this problem. It seems to be a
problem with the ImageMagick software on the server used to generate the
thumbnail. I don't have a hard number for the limit but I'm looking into it.


Steve also noted that he was unable to launch Powerpoint when he tried to
open a ".ppt" file that had worked correctly prior to this. This may have
been my fault. I reset the Mime types for all files to their correct values
to make sure a query I ran was not to blame for it.

Another user found that a wiki page that had been working before was being
rendered wrong, making the page unusable. I fixed the specific problem .

If anyone sees other aberrant behavior in images or pages, please let me
know.


Thanks.

Bill Flanagan
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