Bug: content filter chokes when content reaches certain size

Any one know if this is a known bug?

its not a wordpress bug — its a PHP issue, imo.

I moved my site about a year ago. I had long, very long posts that were displaying fine. When i was done moving, I discovered a few posts were not displaying the content.

The only change? My PHP set up.

I’ve tested it in 3 versions of WP – 2.6.1, 2.6.2 and 2.5.1. When I add a long block of text in WP 2.6.1 and WP 2.6.2 it blanks out after going through the content filter [wpautop] and the page comes out blank (if I disable the content filter the content displays fine). However, in WP 2.5.1 no such problem (same server, same php, same environment). So to me it still looks like a bug introduced in WP 2.6.

After some more testing I’ve figured out it is not actually the size of content in the edit box that causes it to choke but the number of [caption] shortcodes (of maybe any other shortcodes).

To reproduce:
Paste the following into a test page and watch it blank out (in WP 2.6.x):

[caption id="attachment_1" align="alignnone" width="199" caption="Caption 1"]<img title="Test" src="https://www.ads-software.com/screenshots/2.5/ss-4.png" alt="Test" width="199" height="104" />[/caption]
[caption id="attachment_2" align="alignnone" width="199" caption="Caption 2"]<img title="Test" src="https://www.ads-software.com/screenshots/2.5/ss-4.png" alt="Test" width="199" height="104" />[/caption]
[caption id="attachment_3" align="alignnone" width="199" caption="Caption 3"]<img title="Test" src="https://www.ads-software.com/screenshots/2.5/ss-4.png" alt="Test" width="199" height="104" />[/caption]
[caption id="attachment_4" align="alignnone" width="199" caption="Caption 4"]<img title="Test" src="https://www.ads-software.com/screenshots/2.5/ss-4.png" alt="Test" width="199" height="104" />[/caption]
[caption id="attachment_5" align="alignnone" width="199" caption="Caption 5"]<img title="Test" src="https://www.ads-software.com/screenshots/2.5/ss-4.png" alt="Test" width="199" height="104" />[/caption]
[caption id="attachment_6" align="alignnone" width="199" caption="Caption 6"]<img title="Test" src="https://www.ads-software.com/screenshots/2.5/ss-4.png" alt="Test" width="199" height="104" />[/caption]
[caption id="attachment_7" align="alignnone" width="199" caption="Caption 7"]<img title="Test" src="https://www.ads-software.com/screenshots/2.5/ss-4.png" alt="Test" width="199" height="104" />[/caption]
[caption id="attachment_8" align="alignnone" width="199" caption="Caption 8"]<img title="Test" src="https://www.ads-software.com/screenshots/2.5/ss-4.png" alt="Test" width="199" height="104" />[/caption]
[caption id="attachment_9" align="alignnone" width="199" caption="Caption 9"]<img title="Test" src="https://www.ads-software.com/screenshots/2.5/ss-4.png" alt="Test" width="199" height="104" />[/caption]
[caption id="attachment_10" align="alignnone" width="199" caption="Caption 10"]<img title="Test" src="https://www.ads-software.com/screenshots/2.5/ss-4.png" alt="Test" width="199" height="104" />[/caption]
[caption id="attachment_12" align="alignnone" width="199" caption="Caption 11"]<img title="Test" src="https://www.ads-software.com/screenshots/2.5/ss-4.png" alt="Test" width="199" height="104" />[/caption]
[caption id="attachment_13" align="alignnone" width="199" caption="Caption 12"]<img title="Test" src="https://www.ads-software.com/screenshots/2.5/ss-4.png" alt="Test" width="199" height="104" />[/caption]
[caption id="attachment_14" align="alignnone" width="199" caption="Caption 13"]<img title="Test" src="https://www.ads-software.com/screenshots/2.5/ss-4.png" alt="Test" width="199" height="104" />[/caption]
[caption id="attachment_15" align="alignnone" width="199" caption="Caption 14"]<img title="Test" src="https://www.ads-software.com/screenshots/2.5/ss-4.png" alt="Test" width="199" height="104" />[/caption]
[caption id="attachment_16" align="alignnone" width="199" caption="Caption 15"]<img title="Test" src="https://www.ads-software.com/screenshots/2.5/ss-4.png" alt="Test" width="199" height="104" />[/caption]

hmm, well I dunno. maybe we are seeing different issues. I know what caused my problem, and I can replicate it still, just by putting in a super long post. Mine actually started on a much earlier wordpress that didnt use shortcodes also.