Proboards has introduced a monthly attachment space limit. This means that once the forum has reached its monthly limit, no-one can add an attachment until a new month commences. Nor can anyone click on an attached photo to enlarge it. When the monthly limit is reached anyone trying to attach a photo or enlarge a photo receives one of the following messages or similar:
"Error: This forum has exceeded its attachment space limit. Your file cannot be uploaded"
or "Oops, there was an error! This forum has exceeded its attachment space limit."
This applies to everyone on the forum - it doesn't apply to particular individuals and isn't related to your ISP (internet service provider) or the size of the photo.
To avoid this problem the sponsor of a Proboards forum can pay to have the attachment space increased at their own cost.
So what's the answer when you want to upload photos to the forum?
There is no problem with, or limit applied when uploading photos from Photobucket, Flickr, Tinypic or one of the other on-line photo sharing websites. So if you upload photos that way the problem is solved. In addition using one of the photo sharing websites overcomes the limitations of the 'attachment' method of posting photos.