XF 1.5 Unable to Upload Attachment without a bracket ending file name

[Wugthefk]

Hi,

I am unable to upload an attachment on my installation of XF1.5, it gives me this error:

The following error occurred
There was a problem uploading your file.

filenamehereblablabla.jpg

However, this is not an issue when I place a ")" at the end of the file name.

 

[Martok]

Does the problem occur with all add-ons disabled?