Fatal error when uploading

Hello,

First off: thanks for the great module, it's about time the multi upload issue in D7 gets tackled. Plup works great 90% of the time, it's the other 10% I'm posting this issue about :)

I've noticed an error popping up sometimes: Fatal error: Cannot use string offset as an array in /usr/home/user/domains/site.com/public_html/sites/all/modules/contrib/plup/plup.module on line 201. It only happens sometimes and is "announced" by the thumbnails not being generated properly (get the red square). When firebugging the thumbs I get this as img path: /sites/default/files/styles/thumbnail/temporary/,/sites/default/files/styles/thumbnail/temporary/p16kbdlmjgrdf9f2bb2181qhmci.jpg. Notice the comma and the repeat of the path. Error log gives me a Unable to generate the derived image located at -same path as above-. Needles to say the new node is not created/saved.

I have another regular (so no plupload widget) image field in my form, if I do the multiple upload before I do the regular one it does work.